Occultation event with (24451) 00QS104, event index number 5057
Regions able to see the event: Europe
Geocentric closest approach at 2026/12/05 20:04:26 UTC
J2000 position of star is 04:45:18.3 +42:02:02
Equinox of date position of star is 04:47:11.9 +42:04:52
Star is 141 degrees from the moon. Moon is 10% illuminated.
Stellar brightness G=14.8, apparent brightess of occulting body is G=15.2
Use an exposure time of 0.55 seconds with the standard RECON-QHY system.
SNR of 8.1 per integration for unocculted signal
Expected flux drop is 59% with SNR of 4.7 for the occulted depth (per occulted point)
Apparent velocity is 17.7 km/sec on the sky relative to the star, or, 21.1 arcsec/hr.
Position angle of asteroid motion is 93.5 degrees
The recommended exposure time corresponds to 9.8 km per image.
The 1-sigma error in the time of the event is 0.7 seconds.
The 1-sigma cross-track error in the shadow position is 36.3 km.
The sky-plane scale is 3031.7 km/arcsec.
Diameter estimates:
51.3 km assuming a 5% albedo, maximum 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, (2026/12/05 20:04UT) Object RA Dec mag sep mel Aldebaran 04:37:28.1 +16:33:40 0.8 25.61 147 3Iot Aur 04:58:45.1 +33:12:22 2.7 9.16 141 PPM 047304 04:46:05.3 +40:50:03 6.0 1.26 141 PPM 047339 04:48:20.9 +42:23:45 7.2 0.38 140 PPM 047310 04:46:29.7 +42:09:55 9.5 0.16 141 PPM 047322 04:47:38.1 +42:08:19 10.5 0.10 141 24451_00QS104 04:47:11.9 +42:04:52 15.2 140 Positions are for equinox of date
Star training set for 24451_00QS104, (2026/12/05 20:04UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 25.61 147 3Iot Aur 04:56:59.6 +33:09:57 2.7 9.16 141 PPM 047304 04:44:13.0 +40:47:10 6.0 1.26 141 PPM 047339 04:46:26.9 +42:20:57 7.2 0.38 140 PPM 047310 04:44:36.1 +42:07:02 9.5 0.16 141 PPM 047322 04:45:44.4 +42:05:29 10.5 0.10 141 24451_00QS104 04:45:18.3 +42:02:02 15.2 141 Positions are for J2000