Occultation event with (16667) 93XM1, event index number 1254
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/08/27 07:09:17 UTC
J2000 position of star is 03:56:09.2 +06:17:32
Equinox of date position of star is 03:57:31.3 +06:21:55
Star is 139 degrees from the moon. Moon is 16% illuminated.
Stellar brightness G=14.4, 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 9.9 per integration for unocculted signal
Expected flux drop is 79% with SNR of 7.9 for the occulted depth (per occulted point)
Apparent velocity is 10.4 km/sec on the sky relative to the star, or, 11.7 arcsec/hr.
Position angle of asteroid motion is 98.3 degrees
The recommended exposure time corresponds to 4.7 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 35.5 km.
The sky-plane scale is 3211.4 km/arcsec.
Diameter estimates:
42.3 km assuming a 5% albedo, aximum of 4.1 sec for a central chord
17.3 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 35.4 km used for deployment plan.
Star training set for 16667_93XM1, (2025/08/27 07:09UT) Object RA Dec mag sep mel Aldebaran 04:37:23.7 +16:33:31 0.8 14.11 130 Menkar 03:03:37.4 +04:11:20 2.5 13.59 152 PPM 147062 03:58:23.7 +06:06:44 6.3 0.33 139 16667_93XM1 03:57:31.3 +06:21:55 15.9 139 Positions are for equinox of date
Star training set for 16667_93XM1, (2025/08/27 07:09UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 14.11 130 Menkar 03:02:16.8 +04:05:21 2.5 13.59 152 PPM 147062 03:57:01.7 +06:02:23 6.3 0.33 139 16667_93XM1 03:56:09.2 +06:17:32 15.9 139 Positions are for J2000