Occultation event with (5120) Bitias, event index number 4388
Regions able to see the event: Europe
Geocentric closest approach at 2026/10/13 05:35:29 UTC
J2000 position of star is 04:57:12.7 +44:07:13
Equinox of date position of star is 04:59:08.5 +44:09:36
Star is 148 degrees from the moon. Moon is 7% illuminated.
Stellar brightness G=12.8, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 12.5 per integration for unocculted signal
Expected flux drop is 94% with SNR of 11.8 for the occulted depth (per occulted point)
Apparent velocity is 6.5 km/sec on the sky relative to the star, or, 6.8 arcsec/hr.
Position angle of asteroid motion is 130.1 degrees
The recommended exposure time corresponds to 0.8 km per image.
The 1-sigma error in the time of the event is 4.5 seconds.
The 1-sigma cross-track error in the shadow position is 22.2 km.
The sky-plane scale is 3473.9 km/arcsec.
Diameter estimates:
50.8 km assuming a 5% albedo, maximum of 7.8 sec for a central chord
20.8 km assuming a 30% albedo, maximum of 3.2 sec for a central chord
Cross-track diameter of 48.0 km used for deployment plan.
Star training set for 5120_Bitias, (2026/10/13 05:35UT) Object RA Dec mag sep mel Aldebaran 04:37:27.6 +16:33:39 0.8 27.98 158 3Iot Aur 04:58:44.5 +33:12:21 2.7 10.95 153 PPM 047482 04:56:46.9 +44:06:06 6.0 0.43 149 PPM 047511 04:57:57.9 +44:00:23 8.9 0.26 149 5120_Bitias 04:59:08.5 +44:09:36 15.8 148 Positions are for equinox of date
Star training set for 5120_Bitias, (2026/10/13 05:35UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 27.98 158 3Iot Aur 04:56:59.6 +33:09:57 2.7 10.95 153 PPM 047482 04:54:51.2 +44:03:38 6.0 0.43 149 PPM 047511 04:56:02.3 +43:57:58 8.9 0.26 149 5120_Bitias 04:57:12.7 +44:07:13 15.8 148 Positions are for J2000