Occultation event with (5120) Bitias, event index number 1481
Regions able to see the event: Europe
Geocentric closest approach at 2025/11/09 20:30:11 UTC
J2000 position of star is 01:25:20.1 +41:31:12
Equinox of date position of star is 01:26:50.9 +41:39:14
Star is 72 degrees from the moon. Moon is 75% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=15.3
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 26% with SNR of 0.8 for the occulted depth (per occulted point)
Apparent velocity is 16.6 km/sec on the sky relative to the star, or, 19.6 arcsec/hr.
Position angle of asteroid motion is 50.1 degrees
The recommended exposure time corresponds to 16.6 km per image.
The 1-sigma error in the time of the event is 1.9 seconds.
The 1-sigma cross-track error in the shadow position is 16.9 km.
The sky-plane scale is 3046.2 km/arcsec.
Diameter estimates:
50.8 km assuming a 5% albedo, aximum of 3.1 sec for a central chord
20.8 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 48.0 km used for deployment plan.
Star training set for 5120_Bitias, (2025/11/09 20:30UT) Object RA Dec mag sep mel Aldebaran 04:37:24.5 +16:33:33 0.8 47.78 39 57Gam1And 02:05:29.9 +42:27:09 2.3 7.21 65 PPM 044004 01:28:57.5 +41:14:05 6.5 0.58 71 PPM 043969 01:27:01.3 +41:29:10 8.1 0.17 72 5120_Bitias 01:26:50.9 +41:39:14 15.3 71 Positions are for equinox of date
Star training set for 5120_Bitias, (2025/11/09 20:30UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 47.78 39 57Gam1And 02:03:54.1 +42:19:46 2.3 7.21 65 PPM 044004 01:27:26.7 +41:06:04 6.5 0.58 71 PPM 043969 01:25:30.6 +41:21:08 8.1 0.17 72 5120_Bitias 01:25:20.1 +41:31:12 15.3 72 Positions are for J2000