Occultation event with (24451) 00QS104, event index number 4805
Regions able to see the event: Europe
Geocentric closest approach at 2026/11/21 21:22:25 UTC
J2000 position of star is 04:55:34.7 +41:44:51
Equinox of date position of star is 04:57:28.2 +41:47:18
Star is 56 degrees from the moon. Moon is 90% illuminated.
Stellar brightness G=15.5, 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 4.7 per integration for unocculted signal
Expected flux drop is 45% with SNR of 2.1 for the occulted depth (per occulted point)
Apparent velocity is 17.1 km/sec on the sky relative to the star, or, 20.2 arcsec/hr.
Position angle of asteroid motion is 103.9 degrees
The recommended exposure time corresponds to 9.4 km per image.
The 1-sigma error in the time of the event is 0.3 seconds.
The 1-sigma cross-track error in the shadow position is 37.5 km.
The sky-plane scale is 3045.8 km/arcsec.
Diameter estimates:
51.3 km assuming a 5% albedo, maximum of 3.0 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, (2026/11/21 21:22UT) Object RA Dec mag sep mel Aldebaran 04:37:28.0 +16:33:40 0.8 25.59 48 3Iot Aur 04:58:45.0 +33:12:22 2.7 8.59 54 PPM 047447 04:54:42.1 +42:37:45 5.6 0.98 55 PPM 047575 05:01:36.5 +41:54:41 7.4 0.78 56 PPM 047478 04:56:36.9 +41:48:07 8.9 0.16 55 24451_00QS104 04:57:28.2 +41:47:18 15.2 56 Positions are for equinox of date
Star training set for 24451_00QS104, (2026/11/21 21:22UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 25.59 48 3Iot Aur 04:56:59.6 +33:09:57 2.7 8.59 54 PPM 047447 04:52:47.7 +42:35:11 5.6 0.98 55 PPM 047575 04:59:42.6 +41:52:23 7.4 0.78 56 PPM 047478 04:54:43.4 +41:45:38 8.9 0.16 55 24451_00QS104 04:55:34.7 +41:44:51 15.2 56 Positions are for J2000