Occultation event with (24451) 00QS104, event index number 1443
Regions able to see the event: Europe,Japan
Geocentric closest approach at 2025/11/01 20:21:04 UTC
J2000 position of star is 02:20:58.1 +19:40:46
Equinox of date position of star is 02:22:24.7 +19:47:48
Star is 51 degrees from the moon. Moon is 81% illuminated.
Stellar brightness G=15.2, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.55 seconds with the standard RECON-QHY system.
SNR of 5.3 per integration for unocculted signal
Expected flux drop is 35% with SNR of 1.9 for the occulted depth (per occulted point)
Apparent velocity is 17.5 km/sec on the sky relative to the star, or, 22.9 arcsec/hr.
Position angle of asteroid motion is 87.7 degrees
The recommended exposure time corresponds to 9.6 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 26.8 km.
The sky-plane scale is 2741.0 km/arcsec.
Diameter estimates:
51.3 km assuming a 5% albedo, aximum of 2.9 sec for a central chord
20.9 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 40.7 km used for deployment plan.
Star training set for 24451_00QS104, (2025/11/01 20:21UT) Object RA Dec mag sep mel Aldebaran 04:37:24.4 +16:33:33 0.8 32.18 81 Hamal 02:08:38.2 +23:35:00 2.0 4.96 50 22The Ari 02:19:34.1 +20:01:10 5.6 0.70 51 PPM 118123 02:20:35.2 +19:48:17 7.3 0.43 51 PPM 118147 02:22:46.9 +19:46:07 9.5 0.09 51 24451_00QS104 02:22:24.7 +19:47:48 14.6 51 Positions are for equinox of date
Star training set for 24451_00QS104, (2025/11/01 20:21UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 32.18 81 Hamal 02:07:10.8 +23:27:41 2.0 4.96 50 22The Ari 02:18:07.5 +19:54:04 5.6 0.70 51 PPM 118123 02:19:08.6 +19:41:13 7.3 0.43 51 PPM 118147 02:21:20.3 +19:39:05 9.5 0.09 51 24451_00QS104 02:20:58.1 +19:40:46 14.6 51 Positions are for J2000