Occultation event with (3451) Mentor, event index number 4542
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/11/01 23:36:04 UTC
J2000 position of star is 07:08:09.3 -03:58:55
Equinox of date position of star is 07:09:29.5 -04:01:34
Star is 35 degrees from the moon. Moon is 49% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=14.2
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 4.6 per integration for unocculted signal
Expected flux drop is 13% with SNR of 0.6 for the occulted depth (per occulted point)
Apparent velocity is 10.7 km/sec on the sky relative to the star, or, 10.4 arcsec/hr.
Position angle of asteroid motion is 1.1 degrees
The recommended exposure time corresponds to 21.3 km per image.
The 1-sigma error in the time of the event is 3.5 seconds.
The 1-sigma cross-track error in the shadow position is 1.1 km.
The sky-plane scale is 3703.0 km/arcsec.
Diameter estimates:
122.5 km assuming a 5% albedo, maximum of 11.5 sec for a central chord
50.0 km assuming a 30% albedo, maximum of 4.7 sec for a central chord
Cross-track diameter of 126.3 km used for deployment plan.
Star training set for 3451_Mentor, (2026/11/01 23:36UT) Object RA Dec mag sep mel Sirius 06:46:19.8 -16:45:15 -1.5 13.94 48 2Bet CMa 06:23:52.9 -17:58:16 2.0 17.86 53 20 Mon 07:11:33.7 -04:16:52 4.9 0.58 35 PPM 189922 07:07:58.3 -03:41:40 8.4 0.50 35 PPM 189959 07:10:08.1 -04:06:08 8.8 0.18 35 3451_Mentor 07:09:29.5 -04:01:34 14.2 35 Positions are for equinox of date
Star training set for 3451_Mentor, (2026/11/01 23:36UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:29 -1.5 13.94 48 2Bet CMa 06:22:42.0 -17:57:21 2.0 17.86 53 20 Mon 07:10:13.7 -04:14:08 4.9 0.58 35 PPM 189922 07:06:38.0 -03:39:04 8.4 0.50 35 PPM 189959 07:08:48.0 -04:03:27 8.8 0.18 35 3451_Mentor 07:08:09.3 -03:58:55 14.2 35 Positions are for J2000