Occultation event with (16667) 93XM1, event index number 1204
Regions able to see the event: SAfrica
Geocentric closest approach at 2025/08/04 02:03:50 UTC
J2000 position of star is 03:45:45.8 +06:19:39
Equinox of date position of star is 03:47:07.7 +06:24:21
Star is 157 degrees from the moon. Moon is 74% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 3.6 per integration for unocculted signal
Expected flux drop is 60% with SNR of 2.2 for the occulted depth (per occulted point)
Apparent velocity is 20.4 km/sec on the sky relative to the star, or, 21.4 arcsec/hr.
Position angle of asteroid motion is 86.5 degrees
The recommended exposure time corresponds to 8.2 km per image.
The 1-sigma error in the time of the event is 0.9 seconds.
The 1-sigma cross-track error in the shadow position is 33.3 km.
The sky-plane scale is 3434.5 km/arcsec.
Diameter estimates:
42.3 km assuming a 5% albedo, aximum of 2.1 sec for a central chord
17.3 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 35.4 km used for deployment plan.
Star training set for 16667_93XM1, (2025/08/04 02:04UT) Object RA Dec mag sep mel Aldebaran 04:37:23.5 +16:33:31 0.8 15.95 169 Menkar 03:03:37.2 +04:11:19 2.5 11.05 149 29 Tau 03:47:02.2 +06:07:42 5.3 0.28 157 PPM 146878 03:46:24.8 +06:42:56 8.5 0.36 157 29 Tau 03:47:02.2 +06:07:42 5.3 0.28 157 PPM 146891 03:47:19.4 +06:26:33 10.1 0.06 157 16667_93XM1 03:47:07.7 +06:24:21 16.0 157 Positions are for equinox of date
Star training set for 16667_93XM1, (2025/08/04 02:04UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 15.95 169 Menkar 03:02:16.8 +04:05:21 2.5 11.05 149 29 Tau 03:45:40.5 +06:03:00 5.3 0.28 157 PPM 146878 03:45:02.8 +06:38:13 8.5 0.36 157 29 Tau 03:45:40.5 +06:03:00 5.3 0.28 157 PPM 146891 03:45:57.5 +06:21:51 10.1 0.06 157 16667_93XM1 03:45:45.8 +06:19:39 16.0 157 Positions are for J2000