Occultation event with (4722) Agelaos, event index number 1555
Regions able to see the event: NMexico
Geocentric closest approach at 2025/11/20 08:57:32 UTC
J2000 position of star is 02:12:25.1 +08:07:38
Equinox of date position of star is 02:13:47.4 +08:14:51
Star is 153 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=15.8, apparent brightess of occulting body is G=14.5
Use an exposure time of 0.90 seconds with the standard RECON-QHY system.
SNR of 4.5 per integration for unocculted signal
Expected flux drop is 24% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 13.3 km/sec on the sky relative to the star, or, 17.7 arcsec/hr.
Position angle of asteroid motion is 83.5 degrees
The recommended exposure time corresponds to 11.9 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 29.9 km.
The sky-plane scale is 2698.0 km/arcsec.
Diameter estimates:
57.3 km assuming a 5% albedo, aximum of 4.3 sec for a central chord
23.4 km assuming a 30% albedo, maximum of 1.8 sec for a central chord
Cross-track diameter of 50.4 km used for deployment plan.
Star training set for 4722_Agelaos, (2025/11/20 08:58UT) Object RA Dec mag sep mel Aldebaran 04:37:24.5 +16:33:33 0.8 35.98 165 68Omi Cet 02:20:39.4 -02:51:41 2.0 11.24 146 65Xi 1Cet 02:14:22.6 +08:58:01 4.4 0.73 153 PPM 145318 02:09:42.0 +08:58:19 6.9 1.24 152 PPM 145353 02:12:11.7 +08:29:23 8.7 0.46 153 PPM 145408 02:15:32.7 +08:09:22 10.1 0.44 153 4722_Agelaos 02:13:47.4 +08:14:51 14.5 153 Positions are for equinox of date
Star training set for 4722_Agelaos, (2025/11/20 08:58UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 35.98 165 68Omi Cet 02:19:20.8 -02:58:46 2.0 11.24 146 65Xi 1Cet 02:13:00.0 +08:50:48 4.4 0.73 153 PPM 145318 02:08:19.5 +08:51:00 6.9 1.24 152 PPM 145353 02:10:49.3 +08:22:07 8.7 0.46 153 PPM 145408 02:14:10.3 +08:02:10 10.1 0.44 153 4722_Agelaos 02:12:25.1 +08:07:38 14.5 153 Positions are for J2000