Occultation event with (3451) Mentor, event index number 4718
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/11/16 07:27:13 UTC
J2000 position of star is 07:06:49.0 -04:53:56
Equinox of date position of star is 07:08:08.7 -04:56:32
Star is 144 degrees from the moon. Moon is 39% illuminated.
Stellar brightness G=14.6, apparent brightess of occulting body is G=14.0
Use an exposure time of 0.75 seconds with the standard RECON-QHY system.
SNR of 9.9 per integration for unocculted signal
Expected flux drop is 37% with SNR of 3.7 for the occulted depth (per occulted point)
Apparent velocity is 10.9 km/sec on the sky relative to the star, or, 11.0 arcsec/hr.
Position angle of asteroid motion is 37.8 degrees
The recommended exposure time corresponds to 8.2 km per image.
The 1-sigma error in the time of the event is 2.7 seconds.
The 1-sigma cross-track error in the shadow position is 22.1 km.
The sky-plane scale is 3576.1 km/arcsec.
Diameter estimates:
122.5 km assuming a 5% albedo, maximum of 11.2 sec for a central chord
50.0 km assuming a 30% albedo, maximum of 4.6 sec for a central chord
Cross-track diameter of 126.3 km used for deployment plan.
Star training set for 3451_Mentor, (2026/11/16 07:27UT) Object RA Dec mag sep mel Sirius 06:46:19.9 -16:45:15 -1.5 12.97 132 2Bet CMa 06:23:53.0 -17:58:16 2.0 16.93 128 20 Mon 07:11:33.8 -04:16:52 4.9 1.08 146 PPM 189918 07:07:51.3 -04:58:42 8.5 0.08 144 3451_Mentor 07:08:08.7 -04:56:32 14.0 145 Positions are for equinox of date
Star training set for 3451_Mentor, (2026/11/16 07:27UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:29 -1.5 12.97 132 2Bet CMa 06:22:42.0 -17:57:21 2.0 16.93 128 20 Mon 07:10:13.7 -04:14:08 4.9 1.08 146 PPM 189918 07:06:31.6 -04:56:06 8.5 0.08 144 3451_Mentor 07:06:49.0 -04:53:56 14.0 144 Positions are for J2000