Occultation event with (24451) 00QS104, event index number 4459
Regions able to see the event: Europe
Geocentric closest approach at 2026/10/23 01:44:29 UTC
J2000 position of star is 05:11:04.3 +40:10:55
Equinox of date position of star is 05:12:56.4 +40:12:47
Star is 90 degrees from the moon. Moon is 88% illuminated.
Stellar brightness G=16.7, apparent brightess of occulting body is G=15.5
Use an exposure time of 1.30 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 26% with SNR of 0.8 for the occulted depth (per occulted point)
Apparent velocity is 11.7 km/sec on the sky relative to the star, or, 13.2 arcsec/hr.
Position angle of asteroid motion is 140.6 degrees
The recommended exposure time corresponds to 15.3 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 31.9 km.
The sky-plane scale is 3202.1 km/arcsec.
Diameter estimates:
51.3 km assuming a 5% albedo, maximum of 4.4 sec for a central chord
20.9 km assuming a 30% albedo, maximum of 1.8 sec for a central chord
Cross-track diameter of 40.7 km used for deployment plan.
Star training set for 24451_00QS104, (2026/10/23 01:44UT) Object RA Dec mag sep mel Aldebaran 04:37:27.7 +16:33:40 0.8 24.87 80 3Iot Aur 04:58:44.6 +33:12:21 2.7 7.56 86 10Eta Aur 05:08:24.0 +41:16:05 3.2 1.36 89 PPM 047782 05:11:51.8 +40:11:03 8.5 0.21 90 24451_00QS104 05:12:56.4 +40:12:47 15.5 90 Positions are for equinox of date
Star training set for 24451_00QS104, (2026/10/23 01:44UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 24.87 80 3Iot Aur 04:56:59.6 +33:09:57 2.7 7.56 86 10Eta Aur 05:06:31.0 +41:14:02 3.2 1.36 89 PPM 047782 05:09:59.8 +40:09:09 8.5 0.21 90 24451_00QS104 05:11:04.3 +40:10:55 15.5 90 Positions are for J2000