Occultation event with (9023) Mnesthus, event index number 1067
Regions able to see the event: SAmericaS
Geocentric closest approach at 2025/06/17 09:19:27 UTC
J2000 position of star is 01:44:59.7 -02:36:44
Equinox of date position of star is 01:46:17.3 -02:29:07
Star is 46 degrees from the moon. Moon is 66% illuminated.
Stellar brightness G=15.8, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 51% with SNR of 1.6 for the occulted depth (per occulted point)
Apparent velocity is 27.9 km/sec on the sky relative to the star, or, 25.8 arcsec/hr.
The recommended exposure time corresponds to 12.6 km per image.
The 1-sigma error in the time of the event is 1.8 seconds.
The 1-sigma cross-track error in the shadow position is 4.2 km.
The sky-plane scale is 3897.2 km/arcsec.
Diameter estimates:
54.0 km assuming a 5% albedo, aximum of 1.9 sec for a central chord
22.0 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 54.0 km used for deployment plan.
Star training set for 9023_Mnesthus, (2025/06/17 09:19UT) Object RA Dec mag sep mel Aldebaran 04:37:23.1 +16:33:30 0.8 46.32 91 68Omi Cet 02:20:38.1 -02:51:48 2.0 8.59 54 PPM 183757 01:44:00.9 -03:33:46 5.0 1.22 45 PPM 183831 01:47:49.7 -02:12:51 8.5 0.47 46 PPM 183800 01:46:16.6 -02:33:03 9.8 0.07 46 9023_Mnesthus 01:46:17.3 -02:29:07 15.9 46 Positions are for equinox of date
Star training set for 9023_Mnesthus, (2025/06/17 09:19UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 46.32 91 68Omi Cet 02:19:20.8 -02:58:46 2.0 8.59 54 PPM 183757 01:42:43.5 -03:41:26 5.0 1.22 45 PPM 183831 01:46:32.0 -02:20:27 8.5 0.47 46 PPM 183800 01:44:59.0 -02:40:40 9.8 0.07 46 9023_Mnesthus 01:44:59.7 -02:36:44 15.9 46 Positions are for J2000