Occultation event with (5120) Bitias, event index number 4224
Regions able to see the event: Europe
Geocentric closest approach at 2026/09/12 03:37:53 UTC
J2000 position of star is 04:54:54.4 +42:54:55
Equinox of date position of star is 04:56:48.4 +42:57:23
Star is 105 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=16.1
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
SNR of 4.1 per integration for unocculted signal
Expected flux drop is 48% with SNR of 2.0 for the occulted depth (per occulted point)
Apparent velocity is 11.8 km/sec on the sky relative to the star, or, 11.3 arcsec/hr.
Position angle of asteroid motion is 53.1 degrees
The recommended exposure time corresponds to 11.8 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 33.2 km.
The sky-plane scale is 3770.9 km/arcsec.
Diameter estimates:
50.8 km assuming a 5% albedo, maximum of 4.3 sec for a central chord
20.8 km assuming a 30% albedo, maximum of 1.8 sec for a central chord
Cross-track diameter of 48.0 km used for deployment plan.
Star training set for 5120_Bitias, (2026/09/12 03:38UT) Object RA Dec mag sep mel Aldebaran 04:37:27.3 +16:33:39 0.8 26.72 112 3Iot Aur 04:58:44.2 +33:12:21 2.7 9.76 106 PPM 047447 04:54:41.3 +42:37:44 5.6 0.51 105 PPM 047487 04:56:55.7 +42:58:21 8.4 0.03 105 5120_Bitias 04:56:48.4 +42:57:23 16.1 104 Positions are for equinox of date
Star training set for 5120_Bitias, (2026/09/12 03:38UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 26.72 112 3Iot Aur 04:56:59.6 +33:09:57 2.7 9.76 106 PPM 047447 04:52:47.7 +42:35:11 5.6 0.51 105 PPM 047487 04:55:01.7 +42:55:54 8.4 0.03 105 5120_Bitias 04:54:54.4 +42:54:55 16.1 105 Positions are for J2000