Occultation event with (3451) Mentor, event index number 4938
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/11/29 08:14:59 UTC
J2000 position of star is 07:03:30.7 -05:33:15
Equinox of date position of star is 07:04:50.1 -05:35:44
Star is 37 degrees from the moon. Moon is 71% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=13.9
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 23% with SNR of 2.2 for the occulted depth (per occulted point)
Apparent velocity is 13.2 km/sec on the sky relative to the star, or, 13.6 arcsec/hr.
Position angle of asteroid motion is 62.5 degrees
The recommended exposure time corresponds to 26.3 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 32.3 km.
The sky-plane scale is 3480.0 km/arcsec.
Diameter estimates:
122.5 km assuming a 5% albedo, maximum of 9.3 sec for a central chord
50.0 km assuming a 30% albedo, maximum of 3.8 sec for a central chord
Cross-track diameter of 126.3 km used for deployment plan.
Star training set for 3451_Mentor, (2026/11/29 08:15UT) Object RA Dec mag sep mel Sirius 06:46:20.0 -16:45:16 -1.5 12.04 48 2Bet CMa 06:23:53.1 -17:58:16 2.0 15.91 53 PPM 189831 07:03:15.6 -05:45:45 4.5 0.43 38 PPM 189880 07:05:39.0 -05:20:51 8.5 0.32 37 PPM 189875 07:05:22.4 -05:51:57 9.0 0.30 37 3451_Mentor 07:04:50.1 -05:35:44 13.9 37 Positions are for equinox of date
Star training set for 3451_Mentor, (2026/11/29 08:15UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:29 -1.5 12.04 48 2Bet CMa 06:22:42.0 -17:57:21 2.0 15.91 53 PPM 189831 07:01:56.3 -05:43:19 4.5 0.43 38 PPM 189880 07:04:19.4 -05:18:20 8.5 0.32 37 PPM 189875 07:04:03.1 -05:49:27 9.0 0.30 37 3451_Mentor 07:03:30.7 -05:33:15 13.9 37 Positions are for J2000