Occultation event with (4722) Agelaos, event index number 1478
Regions able to see the event: SAfrica,Australia
Geocentric closest approach at 2025/11/08 17:58:21 UTC
J2000 position of star is 02:18:24.3 +08:20:40
Equinox of date position of star is 02:19:46.7 +08:27:45
Star is 57 degrees from the moon. Moon is 85% illuminated.
Stellar brightness G=14.2, apparent brightess of occulting body is G=14.3
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 9.4 per integration for unocculted signal
Expected flux drop is 52% with SNR of 4.9 for the occulted depth (per occulted point)
Apparent velocity is 15.2 km/sec on the sky relative to the star, or, 20.6 arcsec/hr.
Position angle of asteroid motion is 80.3 degrees
The recommended exposure time corresponds to 6.1 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 29.1 km.
The sky-plane scale is 2654.6 km/arcsec.
Diameter estimates:
57.3 km assuming a 5% albedo, aximum of 3.8 sec for a central chord
23.4 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 50.4 km used for deployment plan.
Star training set for 4722_Agelaos, (2025/11/08 17:58UT) Object RA Dec mag sep mel Aldebaran 04:37:24.4 +16:33:33 0.8 34.50 24 68Omi Cet 02:20:39.3 -02:51:42 2.0 11.33 63 65Xi 1Cet 02:14:22.4 +08:58:00 4.4 1.43 58 PPM 145474 02:20:04.0 +08:17:56 7.7 0.18 57 4722_Agelaos 02:19:46.7 +08:27:45 14.3 57 Positions are for equinox of date
Star training set for 4722_Agelaos, (2025/11/08 17:58UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 34.50 24 68Omi Cet 02:19:20.8 -02:58:46 2.0 11.33 63 65Xi 1Cet 02:13:00.0 +08:50:48 4.4 1.43 58 PPM 145474 02:18:41.6 +08:10:51 7.7 0.18 57 4722_Agelaos 02:18:24.3 +08:20:40 14.3 57 Positions are for J2000