Occultation event with (5120) Bitias, event index number 4240
Regions able to see the event: Australia
Geocentric closest approach at 2026/09/14 17:06:28 UTC
J2000 position of star is 04:55:41.8 +43:01:48
Equinox of date position of star is 04:57:35.9 +43:04:14
Star is 136 degrees from the moon. Moon is 14% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=16.1
Use an exposure time of 1.10 seconds with the standard RECON-QHY system.
SNR of 4.5 per integration for unocculted signal
Expected flux drop is 48% with SNR of 2.2 for the occulted depth (per occulted point)
Apparent velocity is 10.8 km/sec on the sky relative to the star, or, 10.3 arcsec/hr.
Position angle of asteroid motion is 49.9 degrees
The recommended exposure time corresponds to 11.8 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 32.1 km.
The sky-plane scale is 3745.0 km/arcsec.
Diameter estimates:
50.8 km assuming a 5% albedo, maximum of 4.7 sec for a central chord
20.8 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 48.0 km used for deployment plan.
Star training set for 5120_Bitias, (2026/09/14 17:06UT) Object RA Dec mag sep mel Aldebaran 04:37:27.4 +16:33:39 0.8 26.85 144 3Iot Aur 04:58:44.2 +33:12:21 2.7 9.87 139 PPM 047447 04:54:41.3 +42:37:44 5.6 0.69 137 PPM 047505 04:57:46.8 +43:11:45 8.4 0.13 136 5120_Bitias 04:57:35.9 +43:04:14 16.1 136 Positions are for equinox of date
Star training set for 5120_Bitias, (2026/09/14 17:06UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 26.85 144 3Iot Aur 04:56:59.6 +33:09:57 2.7 9.87 139 PPM 047447 04:52:47.7 +42:35:11 5.6 0.69 137 PPM 047505 04:55:52.4 +43:09:19 8.4 0.13 136 5120_Bitias 04:55:41.8 +43:01:48 16.1 136 Positions are for J2000