Occultation event with (24451) 00QS104, event index number 4270
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/09/19 07:46:41 UTC
J2000 position of star is 05:11:07.9 +37:40:00
Equinox of date position of star is 05:12:57.0 +37:41:51
Star is 165 degrees from the moon. Moon is 54% illuminated.
Stellar brightness G=13.3, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.14 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 91% with SNR of 8.9 for the occulted depth (per occulted point)
Apparent velocity is 13.8 km/sec on the sky relative to the star, or, 14.1 arcsec/hr.
Position angle of asteroid motion is 35.2 degrees
The recommended exposure time corresponds to 1.9 km per image.
The 1-sigma error in the time of the event is 2.6 seconds.
The 1-sigma cross-track error in the shadow position is 10.5 km.
The sky-plane scale is 3512.2 km/arcsec.
Diameter estimates:
51.3 km assuming a 5% albedo, maximum of 3.7 sec for a central chord
20.9 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 40.7 km used for deployment plan.
Star training set for 24451_00QS104, (2026/09/19 07:47UT) Object RA Dec mag sep mel Aldebaran 04:37:27.4 +16:33:39 0.8 22.54 156 3Iot Aur 04:58:44.3 +33:12:21 2.7 5.34 164 PPM 070048 05:15:06.0 +37:21:57 6.5 0.54 165 PPM 070021 05:13:28.5 +37:49:59 9.5 0.17 165 24451_00QS104 05:12:57.0 +37:41:51 15.8 165 Positions are for equinox of date
Star training set for 24451_00QS104, (2026/09/19 07:47UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 22.54 156 3Iot Aur 04:56:59.6 +33:09:57 2.7 5.34 164 PPM 070048 05:13:17.2 +37:20:11 6.5 0.54 165 PPM 070021 05:11:39.2 +37:48:09 9.5 0.17 165 24451_00QS104 05:11:07.9 +37:40:00 15.8 165 Positions are for J2000