Occultation event with (1143) Odysseus, event index number 3355
Regions able to see the event: Australia
Geocentric closest approach at 2026/03/05 15:42:56 UTC
J2000 position of star is 11:25:36.0 +00:25:11
Equinox of date position of star is 11:26:56.5 +00:16:32
Star is 19 degrees from the moon. Moon is 95% illuminated.
Stellar brightness G=12.6, apparent brightess of occulting body is G=12.9
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 12.9 per integration for unocculted signal
Expected flux drop is 58% with SNR of 7.5 for the occulted depth (per occulted point)
Apparent velocity is 16.3 km/sec on the sky relative to the star, or, 20.0 arcsec/hr.
Position angle of asteroid motion is 114.2 degrees
The recommended exposure time corresponds to 2.0 km per image.
The 1-sigma error in the time of the event is 1.9 seconds.
The 1-sigma cross-track error in the shadow position is 31.1 km.
The sky-plane scale is 2937.6 km/arcsec.
Diameter estimates:
126.5 km assuming a 5% albedo, maximum of 7.8 sec for a central chord
51.6 km assuming a 30% albedo, maximum of 3.2 sec for a central chord
Cross-track diameter of 114.6 km used for deployment plan.
Star training set for 1143_Odysseus, (2026/03/05 15:43UT) Object RA Dec mag sep mel Regulus 10:09:45.8 +11:50:18 1.3 22.37 41 Denebola 11:50:23.6 +14:25:32 2.1 15.29 25 79 Leo 11:25:23.0 +01:15:49 6.4 1.06 20 PPM 157801 11:24:38.4 -00:00:43 7.5 0.64 20 PPM 157827 11:26:23.6 -00:01:43 9.7 0.33 19 PPM 157822 11:26:09.3 +00:14:06 10.3 0.20 19 1143_Odysseus 11:26:56.5 +00:16:32 12.9 19 Positions are for equinox of date
Star training set for 1143_Odysseus, (2026/03/05 15:43UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 22.37 41 Denebola 11:49:02.7 +14:34:16 2.1 15.29 25 79 Leo 11:24:02.3 +01:24:28 6.4 1.06 20 PPM 157801 11:23:17.9 +00:07:55 7.5 0.64 20 PPM 157827 11:25:03.1 +00:06:56 9.7 0.33 19 PPM 157822 11:24:48.8 +00:22:44 10.3 0.20 19 1143_Odysseus 11:25:36.0 +00:25:11 12.9 19 Positions are for J2000