Occultation event with (24451) 00QS104, event index number 4087
Regions able to see the event: Australia
Geocentric closest approach at 2026/08/23 19:20:54 UTC
J2000 position of star is 04:59:04.0 +35:38:43
Equinox of date position of star is 05:00:50.6 +35:41:01
Star is 155 degrees from the moon. Moon is 82% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 41% with SNR of 1.3 for the occulted depth (per occulted point)
Apparent velocity is 22.9 km/sec on the sky relative to the star, or, 21.8 arcsec/hr.
Position angle of asteroid motion is 58.9 degrees
The recommended exposure time corresponds to 19.5 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 23.1 km.
The sky-plane scale is 3781.2 km/arcsec.
Diameter estimates:
51.3 km assuming a 5% albedo, maximum of 2.2 sec for a central chord
20.9 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 40.7 km used for deployment plan.
Star training set for 24451_00QS104, (2026/08/23 19:21UT) Object RA Dec mag sep mel Aldebaran 04:37:27.2 +16:33:38 0.8 19.82 147 3Iot Aur 04:58:44.0 +33:12:20 2.7 2.52 155 PPM 069764 04:58:07.0 +36:12:31 6.0 0.76 154 PPM 069813 05:01:28.3 +35:35:49 9.4 0.15 155 24451_00QS104 05:00:50.6 +35:41:01 15.9 155 Positions are for equinox of date
Star training set for 24451_00QS104, (2026/08/23 19:21UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 19.82 147 3Iot Aur 04:56:59.6 +33:09:57 2.7 2.52 155 PPM 069764 04:56:20.0 +36:10:07 6.0 0.76 154 PPM 069813 04:59:41.8 +35:33:32 9.4 0.15 155 24451_00QS104 04:59:04.0 +35:38:43 15.9 155 Positions are for J2000