Occultation event with (4722) Agelaos, event index number 4455
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/10/22 08:17:54 UTC
J2000 position of star is 05:24:02.0 +24:29:30
Equinox of date position of star is 05:25:40.6 +24:30:52
Star is 101 degrees from the moon. Moon is 83% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=15.0
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 4.8 per integration for unocculted signal
Expected flux drop is 23% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 5.4 km/sec on the sky relative to the star, or, 6.5 arcsec/hr.
Position angle of asteroid motion is 115.3 degrees
The recommended exposure time corresponds to 10.9 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 36.1 km.
The sky-plane scale is 2997.7 km/arcsec.
Diameter estimates:
57.3 km assuming a 5% albedo, maximum of 10.5 sec for a central chord
23.4 km assuming a 30% albedo, maximum of 4.3 sec for a central chord
Cross-track diameter of 50.4 km used for deployment plan.
Star training set for 4722_Agelaos, (2026/10/22 08:18UT) Object RA Dec mag sep mel Aldebaran 04:37:27.7 +16:33:40 0.8 13.80 89 Alnath 05:27:59.3 +28:37:39 1.6 4.15 102 109 Tau 05:20:53.4 +22:07:18 4.9 2.63 100 PPM 094385 05:29:33.1 +23:18:47 8.4 1.49 102 PPM 094360 05:27:55.4 +24:06:50 9.7 0.65 102 PPM 094327 05:25:23.2 +24:28:30 11.8 0.08 101 4722_Agelaos 05:25:40.6 +24:30:52 15.0 102 Positions are for equinox of date
Star training set for 4722_Agelaos, (2026/10/22 08:18UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 13.80 89 Alnath 05:26:17.6 +28:36:22 1.6 4.15 102 109 Tau 05:19:16.6 +22:05:45 4.9 2.63 100 PPM 094385 05:27:55.4 +23:17:34 8.4 1.49 102 PPM 094360 05:26:17.1 +24:05:33 9.7 0.65 102 PPM 094327 05:23:44.7 +24:27:07 11.8 0.08 101 4722_Agelaos 05:24:02.0 +24:29:30 15.0 101 Positions are for J2000