Occultation event with (3451) Mentor, event index number 4774
Regions able to see the event: Australia
Geocentric closest approach at 2026/11/19 17:48:53 UTC
J2000 position of star is 07:06:07.8 -05:05:27
Equinox of date position of star is 07:07:27.4 -05:08:01
Star is 113 degrees from the moon. Moon is 72% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=14.0
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 4.1 per integration for unocculted signal
Expected flux drop is 11% with SNR of 0.5 for the occulted depth (per occulted point)
Apparent velocity is 11.4 km/sec on the sky relative to the star, or, 11.5 arcsec/hr.
Position angle of asteroid motion is 45.3 degrees
The recommended exposure time corresponds to 22.8 km per image.
The 1-sigma error in the time of the event is 2.4 seconds.
The 1-sigma cross-track error in the shadow position is 26.0 km.
The sky-plane scale is 3548.7 km/arcsec.
Diameter estimates:
122.5 km assuming a 5% albedo, maximum of 10.8 sec for a central chord
50.0 km assuming a 30% albedo, maximum of 4.4 sec for a central chord
Cross-track diameter of 126.3 km used for deployment plan.
Star training set for 3451_Mentor, (2026/11/19 17:49UT) Object RA Dec mag sep mel Sirius 06:46:20.0 -16:45:15 -1.5 12.72 107 2Bet CMa 06:23:53.0 -17:58:16 2.0 16.68 102 19 Mon 07:04:14.9 -04:16:49 5.0 1.17 113 PPM 189918 07:07:51.3 -04:58:42 8.5 0.18 114 3451_Mentor 07:07:27.4 -05:08:01 14.0 114 Positions are for equinox of date
Star training set for 3451_Mentor, (2026/11/19 17:49UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:29 -1.5 12.72 107 2Bet CMa 06:22:42.0 -17:57:21 2.0 16.68 102 19 Mon 07:02:54.8 -04:14:21 5.0 1.17 113 PPM 189918 07:06:31.6 -04:56:06 8.5 0.18 114 3451_Mentor 07:06:07.8 -05:05:27 14.0 113 Positions are for J2000