Occultation event with (2363) Cebriones, event index number 1642
Regions able to see the event: Europe,SMexico
Geocentric closest approach at 2025/12/06 03:10:46 UTC
J2000 position of star is 03:41:38.0 +00:58:30
Equinox of date position of star is 03:42:58.3 +01:03:23
Star is 43 degrees from the moon. Moon is 98% illuminated.
Stellar brightness G=12.5, apparent brightess of occulting body is G=14.2
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 14.7 per integration for unocculted signal
Expected flux drop is 82% with SNR of 12.1 for the occulted depth (per occulted point)
Apparent velocity is 17.5 km/sec on the sky relative to the star, or, 19.2 arcsec/hr.
Position angle of asteroid motion is 66.8 degrees
The recommended exposure time corresponds to 2.1 km per image.
The 1-sigma error in the time of the event is 0.2 seconds.
The 1-sigma cross-track error in the shadow position is 32.1 km.
The sky-plane scale is 3271.9 km/arcsec.
Diameter estimates:
93.8 km assuming a 5% albedo, aximum of 5.4 sec for a central chord
38.3 km assuming a 30% albedo, maximum of 2.2 sec for a central chord
Cross-track diameter of 96.0 km used for deployment plan.
Star training set for 2363_Cebriones, (2025/12/06 03:11UT) Object RA Dec mag sep mel Aldebaran 04:37:24.7 +16:33:33 0.8 20.49 23 Menkar 03:03:38.3 +04:11:24 2.5 10.31 49 10 Tau 03:38:11.9 +00:28:56 4.3 1.32 45 PPM 146889 03:47:04.7 +00:41:48 8.5 1.09 43 PPM 146856 03:44:48.5 +01:13:55 9.8 0.49 43 PPM 146824 03:42:57.3 +01:11:37 10.9 0.14 43 2363_Cebriones 03:42:58.3 +01:03:23 14.2 43 Positions are for equinox of date
Star training set for 2363_Cebriones, (2025/12/06 03:11UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 20.49 23 Menkar 03:02:16.8 +04:05:21 2.5 10.31 49 10 Tau 03:36:52.0 +00:23:54 4.3 1.32 45 PPM 146889 03:45:44.6 +00:37:02 8.5 1.09 43 PPM 146856 03:43:28.1 +01:09:05 9.8 0.49 43 PPM 146824 03:41:37.0 +01:06:43 10.9 0.14 43 2363_Cebriones 03:41:38.0 +00:58:30 14.2 43 Positions are for J2000