Occultation event with (4722) Agelaos, event index number 1587
Regions able to see the event: UAE
Geocentric closest approach at 2025/11/25 16:04:43 UTC
J2000 position of star is 02:10:02.2 +08:04:13
Equinox of date position of star is 02:11:24.5 +08:11:30
Star is 90 degrees from the moon. Moon is 25% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=14.6
Use an exposure time of 1.05 seconds with the standard RECON-QHY system.
SNR of 7.4 per integration for unocculted signal
Expected flux drop is 34% with SNR of 2.5 for the occulted depth (per occulted point)
Apparent velocity is 12.0 km/sec on the sky relative to the star, or, 15.8 arcsec/hr.
Position angle of asteroid motion is 85.7 degrees
The recommended exposure time corresponds to 12.6 km per image.
The 1-sigma error in the time of the event is 1.6 seconds.
The 1-sigma cross-track error in the shadow position is 31.1 km.
The sky-plane scale is 2727.0 km/arcsec.
Diameter estimates:
57.3 km assuming a 5% albedo, aximum of 4.8 sec for a central chord
23.4 km assuming a 30% albedo, maximum of 2.0 sec for a central chord
Cross-track diameter of 50.4 km used for deployment plan.
Star training set for 4722_Agelaos, (2025/11/25 16:05UT) Object RA Dec mag sep mel Aldebaran 04:37:24.6 +16:33:33 0.8 36.56 126 68Omi Cet 02:20:39.4 -02:51:41 2.0 11.29 88 65Xi 1Cet 02:14:22.6 +08:58:01 4.4 1.07 91 PPM 145318 02:09:42.0 +08:58:19 6.9 0.89 90 PPM 145353 02:12:11.7 +08:29:23 8.7 0.36 90 PPM 145352 02:12:10.6 +08:00:38 10.4 0.26 90 4722_Agelaos 02:11:24.5 +08:11:30 14.6 90 Positions are for equinox of date
Star training set for 4722_Agelaos, (2025/11/25 16:05UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 36.56 126 68Omi Cet 02:19:20.8 -02:58:46 2.0 11.29 88 65Xi 1Cet 02:13:00.0 +08:50:48 4.4 1.07 91 PPM 145318 02:08:19.5 +08:51:00 6.9 0.89 90 PPM 145353 02:10:49.3 +08:22:07 8.7 0.36 90 PPM 145352 02:10:48.3 +07:53:22 10.4 0.26 90 4722_Agelaos 02:10:02.2 +08:04:13 14.6 90 Positions are for J2000