Occultation event with (5120) Bitias, event index number 1403
Regions able to see the event: Europe
Geocentric closest approach at 2025/10/23 18:13:17 UTC
J2000 position of star is 01:35:39.9 +42:41:11
Equinox of date position of star is 01:37:12.2 +42:49:03
Star is 150 degrees from the moon. Moon is 5% illuminated.
Stellar brightness G=16.6, apparent brightess of occulting body is G=15.3
Use an exposure time of 1.20 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 23% with SNR of 0.7 for the occulted depth (per occulted point)
Apparent velocity is 16.4 km/sec on the sky relative to the star, or, 19.4 arcsec/hr.
Position angle of asteroid motion is 67.2 degrees
The recommended exposure time corresponds to 19.6 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 25.8 km.
The sky-plane scale is 3030.9 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, (2025/10/23 18:13UT) Object RA Dec mag sep mel Aldebaran 04:37:24.3 +16:33:33 0.8 46.34 162 57Gam1And 02:05:29.7 +42:27:08 2.3 5.21 155 PPM 044298 01:42:13.2 +43:25:38 5.8 1.10 151 PPM 044210 01:38:13.9 +42:04:41 8.3 0.76 151 PPM 044219 01:38:27.1 +42:47:14 9.4 0.23 151 5120_Bitias 01:37:12.2 +42:49:03 15.3 151 Positions are for equinox of date
Star training set for 5120_Bitias, (2025/10/23 18:13UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 46.34 162 57Gam1And 02:03:54.1 +42:19:46 2.3 5.21 155 PPM 044298 01:40:39.9 +43:17:51 5.8 1.10 151 PPM 044210 01:36:41.7 +41:56:50 8.3 0.76 151 PPM 044219 01:36:54.6 +42:39:23 9.4 0.23 151 5120_Bitias 01:35:39.9 +42:41:11 15.3 150 Positions are for J2000