Occultation event with (24451) 00QS104, event index number 1709
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/12/22 23:19:10 UTC
J2000 position of star is 01:57:56.1 +19:22:10
Equinox of date position of star is 01:59:22.1 +19:29:42
Star is 91 degrees from the moon. Moon is 8% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=15.3
Use an exposure time of 1.05 seconds with the standard RECON-QHY system.
SNR of 9.9 per integration for unocculted signal
Expected flux drop is 56% with SNR of 5.5 for the occulted depth (per occulted point)
Apparent velocity is 4.0 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
Position angle of asteroid motion is 102.8 degrees
The recommended exposure time corresponds to 4.2 km per image.
The 1-sigma error in the time of the event is 4.6 seconds.
The 1-sigma cross-track error in the shadow position is 31.8 km.
The sky-plane scale is 3046.5 km/arcsec.
Diameter estimates:
51.3 km assuming a 5% albedo, aximum of 12.9 sec for a central chord
20.9 km assuming a 30% albedo, maximum of 5.3 sec for a central chord
Cross-track diameter of 40.7 km used for deployment plan.
Star training set for 24451_00QS104, (2025/12/22 23:19UT) Object RA Dec mag sep mel Aldebaran 04:37:24.9 +16:33:34 0.8 37.61 125 6Bet Ari 01:56:04.8 +20:56:02 2.6 1.63 91 15 Ari 02:12:04.3 +19:37:18 5.7 3.00 94 PPM 117845 02:00:20.2 +18:29:00 8.2 1.04 91 PPM 117814 01:58:39.9 +19:24:11 9.5 0.19 91 24451_00QS104 01:59:22.1 +19:29:42 15.3 91 Positions are for equinox of date
Star training set for 24451_00QS104, (2025/12/22 23:19UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 37.61 125 6Bet Ari 01:54:38.6 +20:48:26 2.6 1.63 91 15 Ari 02:10:37.7 +19:30:00 5.7 3.00 94 PPM 117845 01:58:54.6 +18:21:29 8.2 1.04 91 PPM 117814 01:57:14.0 +19:16:38 9.5 0.19 91 24451_00QS104 01:57:56.1 +19:22:10 15.3 91 Positions are for J2000