Occultation event with (3451) Mentor, event index number 4704
Regions able to see the event: Australia
Geocentric closest approach at 2026/11/15 14:11:34 UTC
J2000 position of star is 07:06:56.6 -04:51:25
Equinox of date position of star is 07:08:16.3 -04:54:02
Star is 148 degrees from the moon. Moon is 32% illuminated.
Stellar brightness G=11.0, apparent brightess of occulting body is G=14.0
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 36.3 per integration for unocculted signal
Expected flux drop is 94% with SNR of 34.2 for the occulted depth (per occulted point)
Apparent velocity is 10.8 km/sec on the sky relative to the star, or, 10.9 arcsec/hr.
Position angle of asteroid motion is 36.1 degrees
The recommended exposure time corresponds to 1.3 km per image.
The 1-sigma error in the time of the event is 2.8 seconds.
The 1-sigma cross-track error in the shadow position is 21.1 km.
The sky-plane scale is 3582.0 km/arcsec.
Diameter estimates:
122.5 km assuming a 5% albedo, maximum of 11.3 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, (2026/11/15 14:12UT) Object RA Dec mag sep mel Sirius 06:46:19.9 -16:45:15 -1.5 13.02 135 2Bet CMa 06:23:53.0 -17:58:16 2.0 16.99 131 20 Mon 07:11:33.8 -04:16:52 4.9 1.03 149 PPM 189918 07:07:51.3 -04:58:42 8.5 0.13 148 3451_Mentor 07:08:16.3 -04:54:02 14.0 148 Positions are for equinox of date
Star training set for 3451_Mentor, (2026/11/15 14:12UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:29 -1.5 13.02 135 2Bet CMa 06:22:42.0 -17:57:21 2.0 16.99 131 20 Mon 07:10:13.7 -04:14:08 4.9 1.03 149 PPM 189918 07:06:31.6 -04:56:06 8.5 0.13 148 3451_Mentor 07:06:56.6 -04:51:25 14.0 148 Positions are for J2000