Occultation event with (4722) Agelaos, event index number 1129
Regions able to see the event: Australia
Geocentric closest approach at 2025/07/11 19:45:25 UTC
J2000 position of star is 02:26:34.2 +08:45:39
Equinox of date position of star is 02:27:55.9 +08:52:28
Star is 96 degrees from the moon. Moon is 99% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.4
Use an exposure time of 0.75 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 32% with SNR of 0.9 for the occulted depth (per occulted point)
Apparent velocity is 23.0 km/sec on the sky relative to the star, or, 23.7 arcsec/hr.
The recommended exposure time corresponds to 17.3 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 17.4 km.
The sky-plane scale is 3497.1 km/arcsec.
Diameter estimates:
57.3 km assuming a 5% albedo, aximum of 2.5 sec for a central chord
23.4 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 57.3 km used for deployment plan.
Star training set for 4722_Agelaos, (2025/07/11 19:45UT) Object RA Dec mag sep mel Aldebaran 04:37:23.3 +16:33:31 0.8 32.44 128 Menkar 03:03:37.0 +04:11:18 2.5 10.02 102 73Xi 2Cet 02:29:31.2 +08:34:23 4.3 0.49 96 PPM 145636 02:30:57.0 +09:07:10 7.1 0.78 96 PPM 145577 02:26:59.4 +08:50:08 9.1 0.24 95 4722_Agelaos 02:27:55.9 +08:52:28 15.4 96 Positions are for equinox of date
Star training set for 4722_Agelaos, (2025/07/11 19:45UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 32.44 128 Menkar 03:02:16.8 +04:05:21 2.5 10.02 102 73Xi 2Cet 02:28:09.6 +08:27:36 4.3 0.49 96 PPM 145636 02:29:35.2 +09:00:24 7.1 0.78 96 PPM 145577 02:25:37.8 +08:43:17 9.1 0.24 95 4722_Agelaos 02:26:34.2 +08:45:39 15.4 95 Positions are for J2000