Occultation event with (5120) Bitias, event index number 1454
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/11/04 00:55:07 UTC
J2000 position of star is 01:28:36.7 +41:58:49
Equinox of date position of star is 01:30:08.0 +42:06:48
Star is 32 degrees from the moon. Moon is 96% illuminated.
Stellar brightness G=13.3, apparent brightess of occulting body is G=15.3
Use an exposure time of 0.14 seconds with the standard RECON-QHY system.
SNR of 9.6 per integration for unocculted signal
Expected flux drop is 86% with SNR of 8.2 for the occulted depth (per occulted point)
Apparent velocity is 16.7 km/sec on the sky relative to the star, or, 19.8 arcsec/hr.
Position angle of asteroid motion is 55.9 degrees
The recommended exposure time corresponds to 2.3 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 19.9 km.
The sky-plane scale is 3034.6 km/arcsec.
Diameter estimates:
50.8 km assuming a 5% albedo, aximum of 3.0 sec for a central chord
20.8 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 48.0 km used for deployment plan.
Star training set for 5120_Bitias, (2025/11/04 00:55UT) Object RA Dec mag sep mel Aldebaran 04:37:24.4 +16:33:33 0.8 47.34 50 57Gam1And 02:05:29.8 +42:27:09 2.3 6.55 34 PPM 044004 01:28:57.5 +41:14:04 6.5 0.91 31 PPM 044029 01:30:05.9 +42:24:00 7.3 0.29 32 PPM 044053 01:31:30.3 +42:07:58 9.0 0.26 32 5120_Bitias 01:30:08.0 +42:06:48 15.3 32 Positions are for equinox of date
Star training set for 5120_Bitias, (2025/11/04 00:55UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 47.34 50 57Gam1And 02:03:54.1 +42:19:46 2.3 6.55 34 PPM 044004 01:27:26.7 +41:06:04 6.5 0.91 31 PPM 044029 01:28:34.5 +42:16:01 7.3 0.29 32 PPM 044053 01:29:58.8 +42:00:00 9.0 0.26 32 5120_Bitias 01:28:36.7 +41:58:49 15.3 32 Positions are for J2000