Occultation event with (16667) 93XM1, event index number 4331
Regions able to see the event: Australia
Geocentric closest approach at 2026/09/30 17:37:09 UTC
J2000 position of star is 06:08:38.4 +18:39:19
Equinox of date position of star is 06:10:12.7 +18:38:57
Star is 33 degrees from the moon. Moon is 80% illuminated.
Stellar brightness G=14.5, apparent brightess of occulting body is G=16.4
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 9.4 per integration for unocculted signal
Expected flux drop is 85% with SNR of 8.0 for the occulted depth (per occulted point)
Apparent velocity is 8.4 km/sec on the sky relative to the star, or, 8.2 arcsec/hr.
Position angle of asteroid motion is 82.2 degrees
The recommended exposure time corresponds to 3.8 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 33.5 km.
The sky-plane scale is 3664.6 km/arcsec.
Diameter estimates:
42.3 km assuming a 5% albedo, maximum of 5.0 sec for a central chord
17.3 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 35.4 km used for deployment plan.
Star training set for 16667_93XM1, (2026/09/30 17:37UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.2 +07:24:35 0.4 11.71 35 Alhena 06:39:15.4 +16:22:27 1.9 7.29 41 PPM 122116 06:15:07.6 +18:40:15 6.3 1.16 35 PPM 121950 06:09:36.3 +18:39:49 8.5 0.14 33 16667_93XM1 06:10:12.7 +18:38:57 16.4 34 Positions are for equinox of date
Star training set for 16667_93XM1, (2026/09/30 17:37UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 11.71 35 Alhena 06:37:42.8 +16:23:56 1.9 7.29 41 PPM 122116 06:13:33.3 +18:40:48 6.3 1.16 35 PPM 121950 06:08:01.9 +18:40:10 8.5 0.14 33 16667_93XM1 06:08:38.4 +18:39:19 16.4 33 Positions are for J2000