Occultation event with (5120) Bitias, event index number 1596
Regions able to see the event: Europe
Geocentric closest approach at 2025/11/26 17:31:20 UTC
J2000 position of star is 01:18:04.9 +39:56:46
Equinox of date position of star is 01:19:34.4 +40:04:55
Star is 81 degrees from the moon. Moon is 34% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.4
Use an exposure time of 0.75 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 32% with SNR of 1.0 for the occulted depth (per occulted point)
Apparent velocity is 15.0 km/sec on the sky relative to the star, or, 17.4 arcsec/hr.
Position angle of asteroid motion is 30.9 degrees
The recommended exposure time corresponds to 11.3 km per image.
The 1-sigma error in the time of the event is 2.3 seconds.
The 1-sigma cross-track error in the shadow position is 4.9 km.
The sky-plane scale is 3116.2 km/arcsec.
Diameter estimates:
50.8 km assuming a 5% albedo, aximum of 3.4 sec for a central chord
20.8 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 48.0 km used for deployment plan.
Star training set for 5120_Bitias, (2025/11/26 17:31UT) Object RA Dec mag sep mel Aldebaran 04:37:24.6 +16:33:33 0.8 48.68 113 57Gam1And 02:05:30.1 +42:27:10 2.3 8.94 89 PPM 044012 01:29:17.6 +40:28:10 6.3 1.89 82 PPM 066156 01:20:22.7 +40:05:55 7.9 0.15 81 5120_Bitias 01:19:34.4 +40:04:55 15.4 81 Positions are for equinox of date
Star training set for 5120_Bitias, (2025/11/26 17:31UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 48.68 113 57Gam1And 02:03:54.1 +42:19:46 2.3 8.94 89 PPM 044012 01:27:46.9 +40:20:09 6.3 1.89 82 PPM 066156 01:18:53.2 +39:57:47 7.9 0.15 81 5120_Bitias 01:18:04.9 +39:56:46 15.4 81 Positions are for J2000