Occultation event with (1143) Odysseus, event index number 3825
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/07/02 01:13:29 UTC
J2000 position of star is 11:20:21.9 +02:09:24
Equinox of date position of star is 11:21:43.6 +02:00:40
Star is 133 degrees from the moon. Moon is 96% illuminated.
Stellar brightness G=16.5, apparent brightess of occulting body is G=14.1
Use an exposure time of 1.65 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 10% with SNR of 0.3 for the occulted depth (per occulted point)
Apparent velocity is 23.2 km/sec on the sky relative to the star, or, 21.4 arcsec/hr.
Position angle of asteroid motion is 109.6 degrees
The recommended exposure time corresponds to 38.2 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 33.4 km.
The sky-plane scale is 3892.1 km/arcsec.
Diameter estimates:
126.5 km assuming a 5% albedo, maximum of 5.5 sec for a central chord
51.6 km assuming a 30% albedo, maximum of 2.2 sec for a central chord
Cross-track diameter of 114.6 km used for deployment plan.
Star training set for 1143_Odysseus, (2026/07/02 01:13UT) Object RA Dec mag sep mel Regulus 10:09:46.8 +11:50:12 1.3 20.36 153 Denebola 11:50:24.6 +14:25:26 2.1 14.29 131 75 Leo 11:18:39.2 +01:51:52 6.5 0.78 133 PPM 157763 11:22:17.6 +02:16:36 7.8 0.30 133 1143_Odysseus 11:21:43.6 +02:00:40 14.1 132 Positions are for equinox of date
Star training set for 1143_Odysseus, (2026/07/02 01:13UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 20.36 153 Denebola 11:49:02.7 +14:34:16 2.1 14.29 131 75 Leo 11:17:17.5 +02:00:34 6.5 0.78 133 PPM 157763 11:20:55.9 +02:25:20 7.8 0.30 133 1143_Odysseus 11:20:21.9 +02:09:24 14.1 133 Positions are for J2000