*** ASTRONOMICAL EVENTS FOR HOUSTON, TEXAS ***

texasflag (4k)

produced by Paul Maley, Vice President International Occultation Timing Association and science expedition coordinator for the NASA Johnson Space Center Astronomical Society (pdmaley@yahoo.com)

[LAST UPDATED ON 5/22/2010]

LINK TO SUCCESSFULLY OBSERVED EVENTS

To see asteroid occultations that I have intercepted, click HERE to see a tabulated historical list.

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Here are presented local predictions of eclipses of stars by asteroids (known as asteroid occultations) as well as other interesting astronomical events for the Houston region based on my evaluation of: path error, star magnitude, ease in finding star field, event time proximity to twilight, star elevation/azimuth and other characteristics. My rating system is as follows:
  • X =eXtra special/don't miss it
  • PG=Pretty Good
  • G=Give it a shot
  • M =Maybe worth trying
  • R =Ridiculous but not impossible!

    The main objectives in pursuing and observing asteroid occultations are:

  • to develop information on the shape and size of minor planets
  • to discover a possible hidden companion to the star being occulted
  • to detect the existence of a natural satellite companion to the asteroid
  • to verify the accuracy of the astrometric prediction

      Here is a good example of the Varsavia occultation observed in the USA on July 18, 2003 analyzed by D.W.Dunham where 41 observers data was used to create the profile. Each numbered line represents a single observer's contribution to the development of the shape of this asteroid. Your contribution is uniquely valuable to the understanding of these bodies. We are continually working to study the composition of asteroids that are typically located at an average distance of 150 million miles from earth.

      varsavia (4k)

      Since asteroids are irregular in shape and have rotation periods on the order of hours, one occultation observation can produce an instantaneous profile which would be different were the occultation to have occurred and been recorded an hour later, for example. Here is an example of close up views of the asteroid Itokawa which is just 490 x 180m (1617 x 594 ft) in size. While models tend to fit occultation timings to a typical elliptical shape, it is easy to see that this is only an approximation and that those observations that do not fit the model accurate may be real manifestations of an irregular form.

      itokawa2a (4k)

      Close up views of what an asteroid looks like are virtually impossible to secure from earth or spaceborne telescopes. However, the Japanese spacecraft Hayabusa rendezvoused with the small asteroid Itokawa in September 2005 and took this remarkable photo; you can see the presence of boulders and a highly ragged edge. This appearance can give rise to short phenomena that could cause the disappearance or reappearance to not be instantaneous.

      itokawa4 (4k)

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      UPCOMING ASTEROID OCCULTATIONS AND OTHER EVENTS
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      A principal goal is to attempt to discover an asteroid satellite. While most asteroid targets are large objects that reside in the main asteroid belt region, so called Near Earth Objects (NEOs) which are generally quite under 1km in size may be the best candidates for discoverying companions. In the image below of the asteroid called 2001 SN263 you can see three motion tracks of satellites discovered in February 2008.
      2001SN263 (4k)

      After selecting an event, be sure to scroll down to the REFERENCE DATA to see 1) safety tips, 2) sample occultation timeline, 3) basic info on how to observe an occultation, 4) how to determine if the weather will allow you to see the occultation. For the maps below, the green line represents the CENTER of the predicted path; the blue lines are the predicted northern and southern edges; the red lines are the error limits in both directions. These predictions are not absolute but should be fairly reliable and in many cases very reliable.

      May 31, 2010 (564) DUDU (MONDAY MORNING) RATED: G

      VIEWING AREA: HOUSTON, GALVESTON, BEAUMONT, CORPUS CHRISTI. The 12.3 magnitude, 48 mile wide, asteroid DUDU will occult a 12.0 magnitude star for up to 5 seconds resulting in a 0.9 magnitude drop. The moon is 89% sunlit and 39 deg away. The time is 12:11AM CST. Elevation is 37, azimuth 159. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      053110 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      June 4, 2010 (663) GERLINDE (FRIDAY MORNING) RATED: PG

      VIEWING AREA: LAREDO, MCALLEN, MIDLAND. The 14.2 magnitude, 67 mile wide, asteroid GERLINDE will occult a 12.2 magnitude star for up to 10 seconds resulting in a 2.2 magnitude drop. The moon is 54% sunlit and 43 deg away. The time is 5:22AM CST. Elevation is 57, azimuth 200. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      060410 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      June 30, 2010 (755) QUINTILLA (WEDNESDAY NITE) RATED: PG

      VIEWING AREA: N. OF HOUSTON, AUSTIN. The 14.2 magnitude, 38 mile wide, asteroid QUINTILLA will occult a 9.2 magnitude star for up to 11 seconds resulting in a 5.0 magnitude drop. The moon is 80% sunlit and 91 deg away. The time is 11:40PM CST. Elevation is 42, azimuth 199. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      063010 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      July 3, 2010 (218) BIANCA (SATURDAY MORNING) RATED: G

      VIEWING AREA: EL PASO, LUBBOCK, OKLAHOMA CITY. The 12.0 magnitude, 38 mile wide, asteroid BIANCA will occult a 11.8 magnitude star for up to 7 seconds resulting in a 0.9 magnitude drop. The moon is 62% sunlit and 93 deg away. The time is 2:22AM CST. Elevation is 48, azimuth 226. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      070310 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      July 10, 2010 (63) AUSONIA (SATURDAY MORNING) RATED: R

      VIEWING AREA: WACO, LUBBOCK, DALLAS. The 9.9 magnitude, 130 mile wide, asteroid AUSONIA will occult a 11.8 magnitude star for up to 15 seconds resulting in a 0.2 magnitude drop. THIS WILL BE DIFFICULT!! The moon is out of the way. The time is 1:41AM CST. Elevation is 24, azimuth 196. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      071010 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      August 2, 2010 (54) ALEXANDRA (MONDAY MORNING) RATED: PG

      VIEWING AREA: HOUSTON, BEAUMONT. The 11.6 magnitude, 98 mile wide, asteroid ALEXANDRA will occult a 12.0 magnitude star for up to 23 seconds resulting in a 0.6 magnitude drop. The moon is 58% sunlit and 22 degrees away. The time is 5:48am CST. Elevation is 68, azimuth 220. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      080210 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      August 14, 2010 (404) ARSINOE (SATURDAY MORNING) RATED: PG

      VIEWING AREA: HOUSTON, GALVESTON, LAREDO, CORPUS, VICTORIA. The 14.8 magnitude, 64 mile wide, asteroid ARSINOE will occult a 10.3 magnitude star for up to 3 seconds resulting in a 4.5 magnitude drop. The moon is 25% sunlit and 105 degrees away. The time is 6:03AM CST. Elevation is 33, azimuth 82. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      081410 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      August 21, 2010 (16) PSYCHE (SATURDAY MORNING) RATED: X

      VIEWING AREA: DALLAS, WACO, ABILENE, MIDLAND. The 11.1 magnitude, 150 mile wide, asteroid PSYCHE will occult a 8.5 magnitude star for up to 10 seconds resulting in a 2.5 magnitude drop. The moon is 90% sunlit and 141 degrees away. The time is 4:51AM CST. Elevation is 44, azimuth 93. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      082110 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      August 23, 2010 (547) PRAXEDIS (MONDAY MORNING) RATED: PG

      VIEWING AREA: AMARILLO, MIDLAND, LUBBOCK. The 12.7 magnitude, 50 mile wide, asteroid PRAXEDIS will occult a 11.7 magnitude star for up to 11 seconds resulting in a 1.4 magnitude drop. The moon is 98% sunlit and 47 degrees away. The time is 12:25 AM CST. Elevation is 43, azimuth 101. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      082310 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      September 9, 2010 (471) PAPAGENA (THURSDAY MORNING) RATED: R

      VIEWING AREA: HOUSTON, CORPUS CHRISTI, BEAUMONT. The 9.9 magnitude, 92 mile wide, asteroid PAPAGENA will occult a 11.5 magnitude star for up to 11 seconds resulting in a 0.2 magnitude drop. THIS WILL BE DIFFICULT! The moon is out of the way. The time is 6:25 AM CST. Elevation is 22, azimuth 229. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      090910 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      September 11, 2010 (78) DIANA (SATURDAY MORNING) RATED: PG

      VIEWING AREA: BROWNSVILLE TX and BATON ROUGE (and east) LA. The 12.9 magnitude, 90 mile wide, asteroid DIANA will occult a 11.4 magnitude star for up to 7 seconds resulting in a 1.7 magnitude drop. The moon is out of the way. The time is 12:53am CDT. This is a tough event since the elevation is only 11, azimuth 60. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      091110 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      September 12, 2010 (489) COMACINA (SUNDAY MORNING) RATED: PG

      VIEWING AREA: HOUSTON, AUSTIN, WACO, SAN ANGELO. The 14.3 magnitude, 86 mile wide, asteroid COMACINA will occult a 12.0 magnitude star for up to 6 seconds resulting in a 2.5 magnitude drop. The moon is out of the way. The time is 4:55am CDT. Elevation is 9, azimuth 101. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      091210 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      September 13, 2010 (795) FINI (MONDAY MORNING) RATED: PG

      VIEWING AREA: WACO, MIDLAND, EL PASO. The 14.4 magnitude, 50 mile wide, asteroid FINI will occult a 11.6 magnitude star for up to 6 seconds resulting in a 2.9 magnitude drop. The moon is out of the way. The time is 1:35am CDT. Elevation is 55, azimuth 134. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      091310 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      September 13, 2010 (249) ILSE (MONDAY MORNING) RATED: PG

      VIEWING AREA: AMARILLO, LUBBOCK. The 14.5 magnitude, 24 mile wide, asteroid ILSE will occult a 11.4 magnitude star for up to 4 seconds resulting in a 3.1 magnitude drop. The moon is out of the way. The time is 3:48am CDT. Elevation is 65, azimuth 92. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      091310a (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      September 15, 2010 (107) CAMILLA (WEDNESDAY NITE) RATED: G

      VIEWING AREA: DALLAS, ABILENE. The 12.9 magnitude, 150 mile wide, asteroid CAMILLA will occult a 11.8 magnitude star for up to 4 seconds resulting in a 1.5 magnitude drop. The moon is 59% sunlit and 46 degrees away. The time is 10:58pm CDT. Elevation is 46, azimuth 177. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      091510 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      September 23, 2010 (773) IRMINTRAUD (THURSDAY MORNING) RATED: G

      VIEWING AREA: WACO, SHREVEPORT. The 14.9 magnitude, 62 mile wide, asteroid IRMINTRAUD will occult a 11.3 magnitude star for up to 4 seconds resulting in a 3.6 magnitude drop. The moon is 100% sunlit and 101 degrees away. The time is 6:24AM CDT. Elevation is 64, azimuth 70. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      092310 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      September 24, 2010 (136) AUSTRIA (FRIDAY MORNING) RATED: G

      VIEWING AREA: MIDLAND, ABILENE. The 12.2 magnitude, 25 mile wide, asteroid AUSTRIA will occult a 9.9 magnitude star for up to 4 seconds resulting in a 2.4 magnitude drop. The moon is 99% sunlit and 8 degrees away. THIS WILL BE DIFFICULT! The time is 1:32AM CDT. Elevation is 61, azimuth 141. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      092410 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      September 29, 2010 (105) ARTEMIS (WEDNESDAY NITE) RATED: G

      VIEWING AREA: TULSA OK. The 12.9 magnitude, 91 mile wide, asteroid ARTEMIS will occult a 11.4 magnitude star for up to 4 seconds resulting in a 1.7 magnitude drop. The moon is 62% sunlit and 154 degrees away. The time is 8:10PM CDT. Elevation is 49, azimuth 201. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      092810 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      October 3, 2010 (571) DULCINEA (SUNDAY MORNING) RATED: G

      VIEWING AREA: AMARILLO. The 14.2 magnitude, 38 mile wide, asteroid DULCINEA will occult a 10.9 magnitude star for up to 8 seconds resulting in a 3.1 magnitude drop. The moon is 27% sunlit and 61 degrees away. The time is 1:08AM CDT. Elevation is 35, azimuth 78. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      100310 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      October 8, 2010 (695) BELLA (FRIDAY MORNING) RATED: G

      VIEWING AREA: LUBBOCK, WICHITA FALLS. The 12.5 magnitude, 30 mile wide, asteroid BELLA will occult a 12.3 magnitude star for up to 9 seconds resulting in a 0.9 magnitude drop. The moon is out of the way. The time is 2:59AM CDT. Elevation is 85, azimuth 19. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      100810 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      October 14, 2010 (1212) FRANCETTE (THURSDAY MORNING) RATED: G

      VIEWING AREA: LUBBOCK, WICHITA FALLS. The 16.6 magnitude, 50 mile wide, asteroid FRANCETTE will occult a 8.8 magnitude star for up to 3 seconds resulting in a 6.8 magnitude drop. The moon is out of the way. The time is 4:34AM CDT. Elevation is 47, azimuth 105. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      101410 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      October 16, 2010 (1273) HELMA (SATURDAY NITE) RATED: G

      VIEWING AREA: EL PASO, LUBBOCK. The 16.1 magnitude, 26 mile wide, asteroid HELMA will occult a 8.0 magnitude star for up to 4 seconds resulting in a 7.1 magnitude drop. The moon is 70% sunlit and 72 deg away. The time is 9:22pm CDT. Elevation is 29, azimuth 81. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      101610 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      October 20, 2010 (675) LUDMILLA (WEDNESDAY MORNING) RATED: G

      VIEWING AREA: RIO GRANDE VALLEY. The 11.8 magnitude, 54 mile wide, asteroid LUDMILLA will occult a 11.1 magnitude star for up to 12 seconds resulting in a 1.0 magnitude drop. The moon is 93% sunlit and 96 deg away. The time is 2:37AM CDT. Elevation is 47, azimuth 78. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      102010 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      October 21, 2010 (268) ADOREA (THURSDAY MORNING) RATED: PG

      VIEWING AREA: DALLAS, LUBBOCK, ABILENE. The 14.0 magnitude, 85 mile wide, asteroid ADOREA will occult a 10.6 magnitude star for up to 6 seconds resulting in a 3.6 magnitude drop. The moon is 97% sunlit and 104 deg away. The time is 4:10AM CDT. Elevation is 60, azimuth 108. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      102110 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      October 29, 2010 (96) AEGLE (FRIDAY MORNING) RATED: X

      VIEWING AREA: AUSTIN, SAN ANTONIO, VICTORIA, south of Houston. The 12.6 magnitude, 104 mile wide, asteroid AEGLE will occult a 9.7 magnitude star for up to 13 seconds resulting in a 3.0 magnitude drop. The moon is 62% sunlit and 62 degrees away. The time is 3:43am CST. Elevation is 50, azimuth 299. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      102810 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      October 31, 2010 (49) PALES (SUNDAY MORNING) RATED: G

      VIEWING AREA: AMARILLO, OKLAHOMA CITY. The 12.8 magnitude, 91 mile wide, asteroid PALES will occult a 11.9 magnitude star for up to 12 seconds resulting in a 1.3 magnitude drop. The moon is 41% sunlit and 18 degrees away. The time is 1:55am CST. Elevation is 32, azimuth 86. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      103110 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      November 7, 2010 (149) MEDUSA (SUNDAY MORNING) RATED: G

      VIEWING AREA: WACO, SAN ANGELO. The 12.7 magnitude, 12 mile wide, asteroid MEDUSA will occult a 9.5 magnitude star for up to 2 seconds resulting in a 3.3 magnitude drop. The moon is out of the way. The time is 3:36am CST. Elevation is 47, azimuth 260. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      110710 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      November 7, 2010 (140) SIWA (SUNDAY MORNING) RATED: PG

      VIEWING AREA: WACO, SAN ANGLEO. The 10.1 magnitude, 68 mile wide, asteroid SIWA will occult a 11.7 magnitude star for up to 12 seconds resulting in a 1.7 magnitude drop. The moon is out of the way. The time is 1:55am CST. Elevation is 67, azimuth 248. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      110710a (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      November 18, 2010 (536) MERAPI (THURSDAY NITE) RATED: PG

      VIEWING AREA: PHOENIX AZ. The 14.0 magnitude, 120 mile wide, asteroid MERAPI will occult a 11.7 magnitude star for up to 8 seconds resulting in a 2.2 magnitude drop. The moon is 87%sunlit and 55 deg away. The time is 6:35pm MST. Elevation is 26, azimuth 175. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      111810 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      November 18, 2010 (240) VANADIS (THURSDAY NITE) RATED: PG

      VIEWING AREA: PHOENIX AZ. The 13.8 magnitude, 73 mile wide, asteroid VANADIS will occult a 11.9 magnitude star for up to 5 seconds resulting in a 2.3 magnitude drop. The moon is 87% sunlit and 56 deg away. The time is 8:19pm MST. Elevation is 31, azimuth 219. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      111810a (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      November 25, 2010 (1736) FLOIRAC (THURSDAY NITE) RATED: PG

      VIEWING AREA: RIO GRANDE VALLEY. The 16.4 magnitude, 20 mile wide, asteroid FLOIRAC will occult a 6.0 magnitude star for up to 1 seconds resulting in a 10.4 magnitude drop. The moon is 79% sunlit and 156 deg away. The time is 9:37PM CST. Elevation is 23, azimuth 239. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      112510 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      November 28, 2010 (404) ARSINOE (SUNDAY MORNING) RATED: PG

      VIEWING AREA: HOUSTON, BRYAN, DALLAS. The 12.0 magnitude, 19 mile wide, asteroid ARSINOE will occult a 10.5 magnitude star for up to 18 seconds resulting in a 1.7 magnitude drop. The moon is 56% sunlit and 30 deg away. The time is 2:47AM CST. Elevation is 70, azimuth 102. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      112810 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      November 30, 2010 (403) CYANE (TUESDAY MORNING) RATED: PG

      VIEWING AREA: WACO, SAN ANGELO. The 12.2 magnitude, 31 mile wide, asteroid CYANE will occult a 10.4 magnitude star for up to 5 seconds resulting in a 1.5 magnitude drop. The moon is out of the way. The time is 2:24AM CST. Elevation is 32, azimuth 272. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      113010 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      December 4, 2010 (375) URSULA (SATURDAY MORNING) RATED: X

      VIEWING AREA: SAN ANTONIO, CORPUS CHRISTI, MIDLAND. The 12.3 magnitude, 120 mile wide, asteroid URSULA will occult a 10.0 magnitude star for up to 15 seconds resulting in a 2.4 magnitude drop. The moon is out of the way. The time is 6:06am CST. WATCH OUT FOR TWILIGHT! Elevation is 29, azimuth 309. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      120410 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      December 5, 2010 (78) DIANA (SUNDAY MORNING) RATED: X

      VIEWING AREA: OKLAHOMA CITY. The 11.9 magnitude, 72 mile wide, asteroid DIANA will occult a 10.9 magnitude star for up to 14 seconds resulting in a 0.4 magnitude drop. The moon is out of the way. The time is 2:40am CST. Elevation is 64, azimuth 285. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      120510 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      December 6, 2010 (675) LUDMILLA (MONDAY NITE) RATED: PG

      VIEWING AREA: OKLAHOMA CITY, LUBBOCK. The 10.7 magnitude, 62 mile wide, asteroid LUDMILLA will occult a 11.6 magnitude star for up to 10 seconds resulting in a 0.4 magnitude drop. The moon is out of the way. The time is 10:32PM CST. Elevation is 50, azimuth 96. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      120610 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      December 10, 2010 (416) VATICANA (FRIDAY MORNING) RATED: G

      VIEWING AREA: OKLAHOMA CITY, TULSA. The 12.8 magnitude, 50 mile wide, asteroid VATICANA will occult a 10.7 magnitude star for up to 5 seconds resulting in a 1.4 magnitude drop. The moon is out of the way. The time is 1:14AM CST. Elevation is 84, azimuth 222. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      121010 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      December 16, 2010 (1609) BRENDA (THURSDAY MORNING) RATED: PG

      VIEWING AREA: AUSTIN, MIDLAND. The 14.4 magnitude, 24 mile wide, asteroid BRENDA will occult a 10.1 magnitude star for up to 2 seconds resulting in a 4.3 magnitude drop. The moon is 76% sunlit and 68 deg away. The time is 5:05am CST. Elevation is 33, azimuth 270. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      121610 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      December 16, 2010 (609) FULVIA (THURSDAY NITE) RATED: G

      VIEWING AREA: DALLAS, MIDLAND, ABILENE. The 14.5 magnitude, 38 mile wide, asteroid FULVIA will occult a 11.1 magnitude star for up to 4 seconds resulting in a 3.4 magnitude drop. The moon is 81% sunlit and 47 deg away. The time is 9:28pm CST. Elevation is 51, azimuth 104. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      121610a (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      December 17, 2010 (16) PSYCHE (FRIDAY MORNING) RATED: PG

      VIEWING AREA: SAN ANTONIO, CORPUS CHRISTI, south OF HOUSTON AREA. The 9.6 magnitude, 150 mile wide, asteroid PSYCHE will occult a 11.8 magnitude star for up to 23 seconds resulting in a 0.1 magnitude drop. THIS WILL BE VERY DIFFICULT! The moon is 83% sunlit and 40 deg away. The time is 2:27AM CST. Elevation is 52, azimuth 263. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      121710 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      December 23, 2010 (93) MINERVA (THURSDAY NITE) RATED: PG

      VIEWING AREA: WICHITA KS, NORTH OF PHOENIX. The 12.3 magnitude, 92 mile wide, asteroid MINERVA will occult a 11.2 magnitude star for up to 11 seconds resulting in a 1.4 magnitude drop. THIS WILL BE VERY DIFFICULT! The moon is 90% sunlit and 30 deg away. The time is 11:06PM CST. Elevation is 62, azimuth 84. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      122310 (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

      December 23, 2010 (341) CALIFORNIA (THURSDAY NITE) RATED: G

      VIEWING AREA: DALLAS. The 13.8 magnitude, 9 mile wide, asteroid CALIFORNIA will occult a 10.3 magnitude star for up to 1 second resulting in a 3.5 magnitude drop. The moon is 89% sunlit and 31 deg away. The time is 11:36PM CST. Elevation is 70, azimuth 87. If you are interested in observing this, please let me know by sending an email to pdmaley@yahoo.com.

      122310a (4k)

      Details and 5 levels of star charts will be posted later on at CHARTS.

      The interactive map to the path can be found by clicking on PATH.

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      REFERENCE DATA
      -------------------------------------------

      To sign up for observation, contact Paul Maley: pdmaley@yahoo.com catwash (4k)

      BEST RECOMMENDED EQUIPMENT TIPS (as of December 2005)

      I recommend either a Celestron 8 or Meade 8 + f/3.3 corrector lens and multiple eyepieces for visual observation. You must also have a tape recorder and short wave radio source of time signals. The telescope should be on a motor driven mount and preferably be operable in the field so 110VAC power is not required. For video work, we recommend the Supercircuits PC-164 camera. Under good conditions and this set of optics you can visually see or videotape stars to +12 magnitude. A digital short wave radio that can receive 5.0, 10.0 and 15.0 MHz with an audio out jack. I recommend the Eton G4000A which can be bought online for less than US$100. To boost your ability to receive time signals, it helps to attach about 20 ft (6m) of antenna wire to the antenna of your receiver. To record video, you can use a camcorder that can accept VIDEO IN and AUDIO IN so you can directly route time signals and video and record both simultaneously. Warning: some newer DV models and some brands of camcorders do not have this feature. Always verify before purchasing. Avoid GO TO scopes unless you are really proficient with one. You should also be able to manually star hop to a target star. A GPS is useful for finding a precise spot since we need your coordinates measured to the nearest second of arc.

      BASIC INFORMATION ON HOW TO OBSERVE AN ASTEROID OCCULTATION

      See introductory information on what is an asteroid occultation, what can be learned from it at: GENERAL INFO

      Report occultations electronically through this form link. See: REPORT FORM. It has pulldown menus for certain fields and is very easy to complete and to email to the appropriate reporting address.

      HOW TO USE A LINE MAP

      Line maps are lines drawn parallel to the center of the asteroid occultation path. They are equally spaced and are set up both north and south of the track. Each line can run a couple of hundred miles. One observer and one observer only is assigned a line and no one else is allowed to occupy it. That way, each observer can contribute a unique set of data. In the example below line N-10 is shown. The observer should always try to get within a half mile of the line, if not exactly on it. In searching the area look at A (small road where it turns to an L shape), B (road circle), C or E (ends of a road), D, E (another small road intersect). Avoid roads like 183, hwy 59 and 961 which are major roads. A GPS is needed to record the precise coordinates of the site.

      siteex3 (4k)
      Sample line map. Courtesy Fletcher Gray.

      VISUAL AND VIDEO OBSERVATION TECHNIQUES

      You must observe according to standard protocols and watch/record the star without interruption for a 4-minute window centered on the predicted time of occultation. See: VISUAL AND VIDEO METHODS

      SAFETY TIPS WHEN OBSERVING AWAY FROM HOME:

      Observing either from home or out in the field can be fun and also produce good scientifically useful data from minor planet occultations. Safety is the most important element in the observation process and supersedes the actual data collection. Please check out these tips before proceeding on expeditions away from home. Click here for SAFETY TIPS.

      SAMPLE OCCULTATION TIMELINE:

      Take any prediction and use the following timeline:

      • If your experience at finding stars is not extensive, locate the target star in the days before the event. The most common mistake is to either be set up on the wrong star or to wait too long to set up and thus you cannot find the star in time.
      • 12 hours before (predicted time of central occultation): be sure you have checked out all equipment and that it is operating. In SE Texas always use a dewcap and heater if you have exposed objective lenses or corrector plates. Even in winter, dew will form. If you can power a hair dryer, it will save the day. If none of these are available, a last resort is to pullyour scope off the mount, move it into your car and use the car heater to blast hot air on the lens surface. Be sure you have enough time to realign the scope and so that dew won't form before you record the occultation.
      • 2 hours before: be on station at your selected site. Use a GPS to record longitude/latitude of the site; if you are at someone's house, I can compute the longitude/latitude if you send me the address.
      • 30 minutes before: acquire the star no later than this time
      • 20 minutes before: if visually observing, run a test to be sure your voice, shortwave time signals record properly. If not, reposition them and run another test until time signals and voice record evenly.
      • 2 minutes before: begin nonstop observation/recording. Call out 'D' when the star disappears (or 'out'); call out 'R' when it reappears (or 'back'); note your reaction time for each call-out.
      • 2 minutes after: end nonstop observation/recording
      • within 24 hours after: send email to pdmaley@yahoo.com reporting results while details are fresh
      CLEAR SKY CLOCK--THE EASIEST WAY TO DETERMINE IF IT WILL BE CLEAR:
      catuncertain (4k)

      Before venturing out, plan ahead to avoid being clouded over. Click on the link that follows and then find the 'mark' that is closest to the place you are going. Use it the day before and day of the event when Environment Canada updates the model! Be mobile if you can. See: CLEAR SKY CLOCK MAP. Once you click on a 'dot', then click on an observing site. Then click on the CLOUD COVER line and it will bring up a graphic showing the current cloud cover. Click on ANIMATE THIS IMAGE. Next click on the FORWARD DIRECTION arrow and watch as the time increments hour by hour in GMT (UT). Use this to determine where to go or whether it is worthwhile to venture out.

      ASTEROID OCCULTATION PREDICTIONS WORLDWIDE:

      For advance warning of impending asteroid occultations consult the PREDICTIONS site by Steve Preston who has also kindly supplied many of the maps on this web page. When you view that site, do not be confused by the RANK number given to any event as this number does not necessarily correlate to my scale above.

      Another terrific site that features interactive maps that you can customize to fit your site is from Charlie Ridgeway that is now hosted by Derek Breit. You can create a map with any related line with respect to the occultation centerline and also search to find the best sites along and near the line including my favorites: airports, cemeteries, churches, levees and parks. See: OCCULTATION MAPS. The format of this site changes frequently but it does have maps for all asteroid events for the year. Also, be sure your internet browser is compatible with this software or it will not function properly.

      OBSERVATIONS OF ASTEROID OCCULTATIONS I HAVE MADE TO DATE:

      My personal table of successfully observed minor planet occultations can be viewed at OBSERVATIONS MADE TO DATE.

      PAST RESULTS FROM RICHARD NUGENT'S ASTEROID PAGE

      Read about past expeditions in the Houston and Texas area: TEXAS RESULTS

      HISTORICAL SUMMARY OF ASTEROID OCCULTATIONS

      See: OBSERVED ASTEROID OCCULTATIONS

      BINARY ASTEROIDS KNOWN TO EXIST

      See: BINARY ASTEROID LIST

      SOLAR ECLIPSE EXPEDITIONS:

      If you think this is fun, see our SOLAR ECLIPSE TOUR PLANS

      -------------------------------------------
      SOME PAST EVENTS
      -------------------------------------------

      DECEMBER 22, 2006 (547) PRAXEDIS (THURSDAY MORNING)

      I observed this event from near Travis, Texas and recorded an unusual flash just after the star disappearance. After having attempted about 1500 occultations up to this point, I have never seen such a phenomenon. The graphic below shows the spike using the program LIMOVIE just before frame 233. The data was reduced by R. Venable from the original 8mm tape and the flash is quite prominent on the video.

      DECEMBER 13, 2006 (70) PANOPAEA

      The occultation of the 8.6 magnitude star TYC 1231-01469-1 by the asteroid (70) Panopaea is depicted in this presentation calculated by B.Timerson. This event was well predicted by Steve Preston and occurred on December 13, 2006. Eleven Texas observers were part of the team. The letter (M) indicates no occultation was seen. Results show the asteroid appears to be nearly spherical in shape at this specific aspect as seen from the earth.

      panos (4k)

      JANUARY 5, 2006 (466) TISIPHONE (THURSDAY MORNING): RATED PG

      This occultation was successfully observed along Hwy 59 in the vicinity and north of Victoria, TX very close to the most recent prediction. See initial summary report below.

      BACKGROUND:

      A 9.2 magnitude star was occulted for up to 8 seconds by the 72 mile wide asteroid (466) Tisiphone south of Houston. The map below shows the north and south limits between the green lines and the error bars as red lines.

      For details and start charts, see Details.

      tismapa (4k)

      RESULTS

      A front pushed clouds into the Houston-Victoria area and was slow to clear. However, by 4am most clouds had existed the area leaving a few cirrus patches which did impact some observers. The plan was to have mobile observers drive into the lines between S7 and N7 which had the highest probability of seeing an occultation. Errors in the prediction were expected to push possible observations as far north and south as N12 and S12. As it turns out, 8 observers did successfully record the event. The longest chord was reported by Charlie McLeod at 8.44 seconds, his first occultation, which was captured on video. As luck would have it Rick Frankenberger of San Antonio timed a 4.6 second event from close to the southern limit and Dennis Borgman from the George Observatory videotaped a 4.76 second event on the north side of the path. The next station north from Dennis was Triple Nickel, making his first ever attempt using an 8-inch Dob. He clearly reported no occultation. It appears then that the actual north edge was in the 5 mile gap between Borgman and Nickel. A similar suggestion is that the actual southern edge must have been in the 5 mile zone south of the Frankenberger site.

      This is to be considered a highly successful experience and congratulations are in order to the above observers and Paul Sventek, Richard Nugent, Dave Clark and Matt Delevoryas who also timed the occultation. Thanks also to the entire team who braved the weekday morning to get up and attempt this event. Those who made negative observations should clearly see that your work is very valuable! Special appreciation is extended to Fletcher Gray who made a special trip to Victoria 3 days early to scout for good sites in addition to having returned a second time for the event; thanks to Debbie Moran and Doug Rask who also drove long distances into the path. Due to the rare nature of the predicted track appearing to have altered due to a possible perturbation by another asteroid (at least that is the theory), it is hoped that this detailed information will help not only to shed some light on that problem, but also confirm that the size of Tisiphone was a bit larger than had been forecast. This was also a case where the consistent nature of the negative sightings was very important. The fact that we could easily determine the upper boundary of the northern edge of the true path was only made possible by having evenly spaced dedicated observers. We had at least two cases where brief dimmings were seen but other observers who were at virtually the same chords did not confirm them; hence we can chalk these up to passing cirrus.

      Lessons were learned from this experience especially for those who had not observed an occultation before and those who had not observed one in a long time: be sure to give yourself enough time to find the star; if using a GOTO scope, be sure you have enough alignment stars visible in case of cloud; finding the star field east of the meridian and then attempting to relocate it when it has moved to the west side can cause you to get disoriented due to the changing aspect of the star pattern.

      The first graph below shows a preliminary solution that I generated. The fit is not perfect and this should be refinable later on. Though the model shows Tisiphone as an egg (grade AA perhaps?), the fact that the lengths of each chord do not match the shape is not unusual. No asteroids would conform to a precise geometric shape due to their irregular makeup. It also shows that the rotation of the asteroid is important in determining how many observers actually see the occultation. Were it to have passed centrally over Houston we might have 20 or more observations and excellent resolution of the form due to the close observer spacing in the city. The graphic also shows the great value in being assigned a line. If all lines are staffed then we can get complete and accurate coverage across the face of the asteroid. Where the lines are thickest means two observers were literally on top of each other with respect to the ground track because they could not move.

      tiseg (4k)

      Here is another representation by Richard Nugent of the same data.

      tisrn3 (4k)

      The following is a list of the observers who reported following the occultation. The numbers to the left are the line map relationships. The number in parenthesis is the line on the graph above. First you can see what unfortunately happens when 6 observers are fixed and cluster together--the lines just merge revealing a large gap between the line cluster and upper 5 obsevers. The 3 lines touching just the right side of the figure (from top to bottom) correspond to D.Moran, F. Gray and D. Rask positions if they had obtained data. The unbroken lines show observers who saw a 'miss'. B.Tobias position was north of T.Nickel and due to a program plot problem does not show on the graph. B.Taylor's position is the same as Borgman's.

      • N27 K.Drake (1)-------No occultation
      • ...... W.Aulenbacher (6) (Austin area)--No occultation
      • ...... S.Barziza (2)-------No occultation
      • N20 S.Sartor (3)--------No occultation
      • N19 P.Nolan (4)--------No occultation
      • ...... B.Cudnik (5)-------No occultation
      • N15 D.Rogan (7)-------No occultation
      • ...... B.Dillon (9)--------No occultation
      • ...... C.Shaw (8)---------No occultation
      • ...... M.Knewston (10)--No occultation
      • ...... L.Binder (11)-------No occultation
      • ...... W.Whiddon (26)-----No occultation
      • N14 T.Lawrence (12)--No occultation
      • N13 B.Tobias (San Antonio) -- No occultation
      • N13 T.Nickel (13)------No occultation
      • N12 B.Taylor (14)------Clouded out
      • ...... D.Borgman (14)---4.76 second occultation
      • N9 P.Sventek (16)------7.5 second occultation
      • N8 M.Delevoryas(25)--7.1 second occultation
      • N7 D.Moran (17)-------no data
      • N6 C.McLeod (18)-----8.44 second occultation
      • N5 D.Clark (19)---------8.37 second occultation
      • N4 P.Maley (20)--------7.85 second occultation
      • N2 F.Gray (21)----------no data
      • N1 R.Nugent (22)-------7.47 second occultation
      • C.. D.Rask (23)----------no data
      • S2 R.Frankenburger (24) (San Antonio)--4.6 second occultation

      DECEMBER 11, 2005 (628) CHRISTINE (Sunday morning): RATED PG

      A 12.9 magnitude asteroid passed in front of a 11.2 magnitude star for up to 5 seconds in the Houston area. Four chords were obtained, 3 observers missed because they were just outside the path, and 2 other observers were fogged in. Richard Nugent graphed the data as provided by Brian Cudnik, Dave Clark, myself and Richard. Thanks also to Doug Rask, Dana Lambert, Fletcher Gray, Ken Drake, Paul Sventek, and Steve Linscott who also tried for this event. Luckily the sky cleared about 2 hours before hand but there were fog patches in a few places and some bands of cirrus that skirted through. The graph below depicts the results.

      chr121105a (4k)

      AUGUST 13, 2005 (89) JULIA (Saturday morning): RATED X

      A 7.6 magnitude star was eclipsed by Julia for up to 11 seconds. I flew to Regina, Saskatchewan on the night of August 12 arriving 1030pm. The occultation was at 3am the next morning. Skies were generally clear though clouds kept forming to the northwest. I set up at the predicted centerline about 50km west of Regina airport. As the clouds kept coming in I had to move, changing sites no less than 7 times. Finally within 30 minutes of the event I settled on a site about halfway back to the airport and set up my video equipment. The equipment failed and I had no choice but to use 7x35 binoculars and a tape recorder to attempt the occultation. This worked well because skies were clear and dark. Two unexpected things happened. An aurora to the north extending about 15 degrees above the horizon began as a curtain around 11pm, then fell back to a broad glow with stars clearly shining through it.

      sts114aurora (4k)

      This is an aurora observed in August by the STS-114 crew. From the green arc structure it is almost identical to what I observed from Regina.

      The aurora continued all night though clouds covered much of that area from time to time. Also, the Perseids were seen like never before. Classic fast moving meteors of either -1 or +4 magnitude with some in between, the whizzed across the sky leaving brief smoke trains. The longest train lasted 6 seconds. I could see one now and then driving down Highway 1 toward Moose Jaw. It had rained earlier in the day and the moisture content of the air was quite high.

      Result: Success! I recorded about a 9 second occultation at my site. Five or six others were successful from the US though most areas were shrouded in cloud. Upon returning to Houston I learned that auroral activity was quite high for that period and continued through August.

      AUGUST 24, 2004 (11) PARTHENOPE (Tuesday night): RATED M

      This occultation crosses all of the Houston viewing area and has an excellent path accuracy; the star is magnitude 11.7 but the drop is only 0.21 magnitudes. Also the 69% sunlit moon is just 17 degrees away at 8:38pm. Well, maybe it is not that hard except for one more black mark. The sun is a mere 11 degrees below the horizon here, meaning you have little time to acquire the target area after sunset! However, I have already simulated this and found that I can spot the bright stars close by the area 20 minutes before the occultation in 7x35 binoculars. I rate this as M mainly because of the short time to find the field and the very low magnitude drop. Visual observation is not recommended. But the use of video may prove to be successful. A very clear sky is needed. The reward is an exceptionally long occultation of up to 74 seconds. This is typically nearly 30 times the duration of a typical minor planet occultation.

      RESULT: I was successful 6 miles west of Alvin, TX in capturing about a 63 second event with my manually pointed C8, Collins I3 and Watec camera. I still cannot believe it all came together. Anyway, with a rented car I found a site about 5:00pm and waited until the sunset before I began scanning the sky for Polaris. At 8:15 I found it and at 8:29 I was on the star, just 9 minutes before the predicted time. However, from my video tape I believe the disappearance occurred very early and was very indisinct. The reappearance also was less indistinct. The tape will be analyzed photometrically. As far as I know this was the only observation.

      JULY 17,2004 (41) Daphne (Saturday night) ALMOST GUARANTEED TO BE SEEN FROM HOUSTON: RATED PG

      Result: I was successful in videotaping a 16.5 second occultation from Friendswood. Even though the magnitude drop was only predicted to be 0.34, I was surprised to easily see the drop on the small Sony camcorder monitor. I used my standard setup: Celestron 8, Watec video camera, and Collins Image Intensifier. At first I set up a site at JSC but thunderstorm tops could be seen low in the northeast. The forecast had predicted development of evening storms and movement was north to south; I abandoned the JSC site and thought about driving to Victoria but realized that just going about 10 miles west might be enough. At 11pm outflow from the thunderstorms was seen moving from the northeast in the direction of the star field but fortunately the cirrus stayed about 30 degrees away at occultation time.

      Observations were attempted by an NHAC group (Dave Clark et al.) northeast of downtown Houston but were clouded out by thunderstorms. Doug Rask at Seabrook also was victimized by cirrus from the same storms.

      Lesons learned: check the Clear Sky Clock web page for the site you are anticipated observing at; or, watch cable channel News24 in the Houston area (Time Warner) which has weather on every minute ending in 7. They show a model of cloud cover 24 hours ahead of time and it is generally a good predictor of weather patterns. Be mobile and ready to move to another location.

      DECEMBER 31, 2003 Lacrimosa (Wednesday morning) NORTH SIDE OF HOUSTON: RATED PG

      RESULT: Relatively good coverage was set up for the small asteroid. Five observations were made by Texas observers; 10 other observers unfortunately reported misses or, in one case, cloud. The maximum event time was expected to be 5.2 seconds but the maximum observed occultation of 5.62 seconds seen close to the predicted center line indicates the size of Lacrimosa is about 8% larger than predicted (equatorially), and that the prediction itself was relatively good. A small north shift is shown to have occurred based on the reports. Two common problems were experienced again and it is important for observers to be aware of them: 1) one observer observed the incorrect star, 2) dew formed mandating that observers in this part of the country, even in our winter months, should always carry a dew removal device like the Orion Dew Zapper or a portable hair dryer. A dew shield helps but doesnt always work by itself. I recommend not setting up your equipment earlier than 1 to 1.5 hours before the event.

      Here is the list of observers reporting in. Kudos to the entire Lacrimosa observing team!

      1.Kenneth Drake, 8 inch scope, visual reported a 2.5 second occultation

      2.Beth Turner, Meade 8, PC164 video recorded a 5.03 second occultation

      3.Paul Sventek, 10 inch scope, visual reported a 5.0 second occultation

      4.Paul Maley, C8 scope, Watec camera, Collins I3 reported a 5.62 second occultation

      5.Tim Kenyon, 10 inch scope, visual reported a 4.7 second occultation

      Other observers reporting included:

      • 1.Loyd Overcash (Ft. Davis) - cloudy
      • 2.Mike McCants (Austin) - Miss
      • 3.Sam Barziza (Houston) - Miss
      • 4.Richard Nugent (Houston) - Miss
      • 5.Doug Rask (Houston) - Miss
      • 6.Aaron Clevenson (Houston) - Miss
      • 7.Keith Rivich (Houston) - Miss
      • 8.Walter Aulenbacher (south of Austin) - Miss
      • 9.Larry Mitchell (Houston) - Miss
      • 10. Brian Cudnik (Houston) - Miss
      Special recognition is given to 15-year old Beth Turner of the Woodlands who made her first observation and also obtained a complete video recording of the Lacrimosa asteroid occultation. She is perhaps the youngest person historically to have ever observed one of these events. Having become interested in observing the sky at a very young age, she received a telescope a little more than one year ago and is now proficient in its use. The photo below shows Beth and her equipment set up for an occultation. Photo by E.Turner.

      beth1 (4k)

      The following is a reduction of the observations provided by Richard Nugent. The observer coverage was well laid out with only a gap in the two southern observer groups. This was due to the holidays and not having as many persons in the Houston metro area online as we had hoped. Mike McCants definitely reported no event and assuming the shape is as the plot indicates, he was 3.5km from the true south edge. Doug Rask was the northern-most observer who reported a definite miss. The good agreement of the four chords is testimony to the observers and their ability to recognize what was happening. Brian Cudnik reported two brief momentary 'twinkle' events. Since he was outside the asteroid path it is not possible to confirm them. At least four separate video systems were used by the team mostly using the Supercircuits PC164 camera.

      lacr (4k)

      ----------------------------------------------------------------------
      TIMELINE on DECEMBER 30 AND 31 (all times are CST)

      11:00PM TUESDAY NIGHT. Arrive at site and begin set up.

      12:30am WEDNESDAY MORNING. Conduct test to assure your radio and voice record evenly. Verify you have the correct star by checking from two directional approaches.

      12:59am Begin nonstop observing/recording. Look for any and all brightness changes in the star no matter how brief.

      1:01:43am Expect an occultation lasting up to 5 seconds to be seen.

      1:05am Stop observing/recording. Do not leave the site until your position has been accurately noted (or recorded with GPS).

      Within 24hours, send an email to pdmaley@yahoo.com indicating results (positive or negative) and your latitude/longitude, estimated timing errors.

      DECEMBER 24, 2003 Circe (Wednesday morning) SOUTHWEST OF HOUSTON: RATED X

      The most potentially accurate path of 2003 has now been predicted to cross Refugio, Beeville, and Three Rivers centrally with the north limit over Victoria and Pleasanton, south limit at Corpus Christi, Robstown and Freer. It occurs at 3:00am local time on Wednesday morning December 24 (Christmas eve day). All observers in south, central and east Texas are requested to consider this exceptionally favorable event involving 70 mile diameter asteroid Circe and a 11.8 magnitude star. It takes an 8-inch scope to see this one and video with a PC164 camera is recommended. With an uncertainty of 1/4 path width, predictions don't get much more accurate than this. The star will be 60 degrees above the WSW and there is no moon about. This is Christmas eve Day, one week before the Lacrimosa event Dec. 31. The magnitude drop is 0.8 and this should be easily visible in your telescope/video.

      RESULT: Attempted observations were made by Paul Sventek, Larry Mitchell, Charlie McLeod, Paul Maley and Richard Nugent. Only Richard recorded the event with some certainty, logging about an 11 second occultation. The magnitude drop was supposed to be 0.8 but it appears the star may have been a little brighter than predicted and so this confused some observers. Given Richard's location at N5 and the length of his timing, it would appear a slight north shift took place.

      DECEMBER 21, 2003 Kassandra (Saturday evening) Tulsa Oklahoma: RATED X

      This prediction has me observing with the Tulsa Astronomical Society at their location near Mounds, Oklahoma. This site is estimated to be 20% of the way between the center line and southern limit of the occultation path. An 11.8 magnitude star is to be occulted there for up to 8 seconds. Art Lucas is to observe with his C14 and PC164 at Stillwater near the predicted north edge.

      RESULT: A sizable north shift occurred and Art and another observer in Missouri observed an occultation while I observed a miss at Rocky Keys observatory southwest of Tulsa, using a Meade 14, the Watec camera and Collins I3. Richard Nugent observed a miss near the predicted southern limit from Anderson, TX.

      DECEMBER 13, 2003 Vindobona (Saturday evening) ARIZONA: RATED PG

      An 11.2 magnitude star will be occulted by 14.2 magnitude (231) Vindobona from north of Prescott to Flagstaff in the early evening of Dec. 13. I plan to observe in the Sedona area using a C8 with Rick Schaffer of Sedona. The prediction is on the order of that of Thyra so a shift of some sort is likely.

      RESULT: SUCCESS! Using a Meade 12 inch GOTO scope, along with its owner Fulton Wright and Rick Shaffer, a former Astronomy Magazine columnist, we observed a 2.64 second under incredibly dire conditions. Lynn and I drove 130 miles from Scottsdale to Mountainaire under total overcast cirrus arriving less than 3 hours before the event. Our site was at 7000 ft elevation. Unbelievably, as we waited thinking "what are we doing here?",we could see one or two stars. Then the clouds thinned enough for Fulton to perform a 2 star alignment and eventually we could see the 11th magnitude target star as it got about 30 degrees above the eastern sky. One bright Geminid meteor flashed by but the cirrus would not go away. Temperatures dipped to freezing and worries about frost persisted as well as loss of battery power. I used my Collins I3 and Watec camera to sight the star 38 minutes before the occultation. Had we used Rick's C8 it would not have worked because the cirrus was just too much of a problem. Luckily the M12 had great tracking and Fulton had actually located the star the night before and I verified it in real time. Our site was located about 7 miles south of the predicted path. About 7 seconds before the predicted time the star winked out for about half of the maximum predicted duration. All of us watched it in real time on my camcorder monitor. No secondary events were seen; however, the cirrus affected the target in worsening fashion in the minutes following the occultation. Then as we packed up to head home the sky really did clear. This was one of the hairier expeditions and for any number of reasons it almost did not happen.

      The photo below shows Rick's Dodge van and Fulton's M12 along with his makeshift dew cap. Left to right Rick, Paul, Fulton. Photo by Lynn Palmer.

      3guys (4k)

      DECEMBER 7, 2003 Thyra (Saturday evening) ARIZONA: RATED PG

      RESULT: SUCCESS! I videotaped a 1.83 second occultation of an 11th magnitude star by 12.3 magnitude asteroid (115) Thyra from Arizona City at the home of Hazel and Dick Lawler. They have a Meade 10 and a Galaxy 20 inch Dob. Through the courtesy of Steve Dodder I was able to use his C8 and my Watec camera and Collins I3 to videorecord this occultation with the full moon present and the star at an elevation of only 22 degrees. Skies were cloudy to the north and nearly moved in on my site. Luckily the cloud bank kept just north of the area and skies remained clear enough to see the event. The path shifted less than one half path width (25 miles). Luckily for me it was toward my site although it unfortunately left Derald Nye, James McGaha, Jim Stamm, Randy Peterson (with Don Wrigly and John Matthews) with no event. However, because of jet lag, I did not check my audio connection which apparently was not working, so the absolute time of the event was lost. The overall duration was evaluated quite accurately using Derald Nye's time inserter.

      OCTOBER 23, 2003 Aidamina(Thursday evening) West TX, New Mexico: RATED PG

      RESULTS: SUCCESS! 8th magnitude star occulted by the asteroid (978) Aidamina for 6 seconds over W.Texas and New Mexico.

      The diagram below developed by David Dunham illustrates the result. This marks the first time an asteroid occultation was observed by local observers from the Rio Grande Valley of Texas (Paul Gabriel/Mike Mills). Not all observers who set up are shown. Included are Cory Stone (6 miles south of my site), Blayne Primozich and Ken Snelson (23 miles south of my site) who had a miss due to the north shift of the resultant path. Cory took the lead in pulling together the El Paso observers. The dashed lines correspond to the orientation of the axis of the asteroid; the software fit is to a triaxial ellipsoid. A great effort by the El Paso team in addition to the New Mexico observers. My own timings using Tony Nelson's Celestron 11 were recorded on video and the tape reveals the 13.5 magnitude asteroid during the occultation.

      Legend:

      • 1. David Dunham at Yeso Hills, NM
      • 2. Paul Gabriel, Mike Mills at Roma, TX
      • 3. Richard Nugent at Balmorhea, TX
      • 4. Paul Maley, Tony Nelson at Guadalupe Mountains, TX
      • 5. Thomas Dorman at Guadalupe Mountains, TX
      • 6. Steve Preston at Goldendale, WA
      • 7. Robert Eramina at Seattle, WA
      • 8. Mark Vincent at Socorro, NM
      • 9. Mark Komsa at Sunspot, NM
      • 10. Peter Armstrong at Ft. Davis, TX
      • 11. Patrick Wiggins at Toole, UT
      • 13. Blayne Primozich, Ken Snelson at Guadalupe Mountains, TX

        aidamina1 (4k)

        OCTOBER 15, 2003 (Wednesday morning) Texas + northward: FIRST CHINESE ASTRONAUT LAUNCH

        Houston would see a low pass of this historic 22-hour manned flight at 6:28 am with Shenzhou 5 reaching a maximum elevation of merely 8 degrees above azimuth 346. Tough to see in our skies.

        RESULT: SUCCESS! I flew to Dallas at 10pm October 14 (two hours after the liftoff of Shenzhou 5, the flight of the first Chinese taikonaut Yang Liwei), and drove north to Gene Autrey, Oklahoma. I was in position at 5:30 am near an oil well at Gene Autrey, Oklahoma. I first videotaped the decaying Shenzhou 5 rocket body, 145 miles high, at 6:25am on October 15 as it came out of the earth's shadow less than 20 degrees above the northern horizon. The rocket was tumbling slowly with 10.3 second intervals between maxima. Then at 6:28 an object appeared at the appropriate place in the sky which almost fooled me into thinking it was the manned capsule Shenzhou 5. Instead it was Cosmos 1675 rocket moving slowly in nearly the same direction, passing close to Iota Cepheus. Luckily I recognized the slight difference in orbital motion and just 30 seconds later, Shenzhou 5 itself appeared 212 miles high and passed within 1/2 a degree of the russian space junk. I was able to track it for about 2m 37 s. The video was delivered to CNN in Dallas before I flew back to Houston. About a week later I learned CNN showed it. I also took a time exposure photo on ASA400 film and the track of K1675R and Shenzhou 5 appear dimly on the print.

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