Occultation event with (5041) Theotes, event index number 870
Regions able to see the event: UAE
Geocentric closest approach at 2025/03/31 18:52:54 UTC
J2000 position of star is 10:56:56.7 +16:31:30
Equinox of date position of star is 10:58:17.0 +16:23:22
Star is 114 degrees from the moon. Moon is 8% illuminated.
Stellar brightness G=13.8, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.20 seconds with the standard RECON-QHY system.
Expected flux drop is 14% with SNR of 8.8 per integration
Apparent velocity is 12.9 km/sec on the sky relative to the star, or, 15.3 arcsec/hr.
The recommended exposure time corresponds to 2.6 km per image.
The 1-sigma error in the time of the event is 4.3 seconds.
The 1-sigma cross-track error in the shadow position is 31.8 km.
The sky-plane scale is 3024.5 km/arcsec.
Diameter estimates:
40.5 km assuming a 5% albedo, aximum of 3.2 sec for a central chord
16.6 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 40.5 km used for deployment plan.
Star training set for 5041_Theotes, (2025/03/31 18:53UT) Object RA Dec mag sep mel Regulus 10:09:42.8 +11:50:34 1.3 12.62 106 68Del Leo 11:15:26.8 +20:23:06 2.6 5.70 115 52 Leo 10:47:45.4 +14:03:38 5.5 3.45 113 PPM 127850 10:58:57.8 +15:37:31 7.7 0.78 114 PPM 127837 10:57:51.6 +16:29:07 9.5 0.14 114 5041_Theotes 10:58:17.0 +16:23:22 15.8 114 Positions are for equinox of date
Star training set for 5041_Theotes, (2025/03/31 18:53UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 12.62 106 68Del Leo 11:14:06.7 +20:31:22 2.6 5.70 115 52 Leo 10:46:25.1 +14:11:39 5.5 3.45 113 PPM 127850 10:57:37.7 +15:45:38 7.7 0.78 114 PPM 127837 10:56:31.3 +16:37:14 9.5 0.14 114 5041_Theotes 10:56:56.7 +16:31:30 15.8 114 Positions are for J2000