Occultation event with (4722) Agelaos, event index number 4202
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/09/08 05:15:25 UTC
J2000 position of star is 05:16:57.5 +23:32:31
Equinox of date position of star is 05:18:34.9 +23:34:09
Star is 47 degrees from the moon. Moon is 11% illuminated.
Stellar brightness G=11.1, apparent brightess of occulting body is G=15.4
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 35.7 per integration for unocculted signal
Expected flux drop is 98% with SNR of 35.1 for the occulted depth (per occulted point)
Apparent velocity is 15.7 km/sec on the sky relative to the star, or, 16.5 arcsec/hr.
Position angle of asteroid motion is 77.0 degrees
The recommended exposure time corresponds to 1.9 km per image.
The 1-sigma error in the time of the event is 1.0 seconds.
The 1-sigma cross-track error in the shadow position is 33.1 km.
The sky-plane scale is 3442.7 km/arcsec.
Diameter estimates:
57.3 km assuming a 5% albedo, maximum of 3.6 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, (2026/09/08 05:15UT) Object RA Dec mag sep mel Aldebaran 04:37:27.3 +16:33:39 0.8 11.92 58 Alnath 05:27:58.9 +28:37:39 1.6 5.48 45 108 Tau 05:17:04.0 +22:18:46 6.2 1.30 48 PPM 094241 05:19:09.4 +24:02:10 7.9 0.49 47 PPM 094215 05:17:30.8 +23:12:18 11.2 0.44 48 4722_Agelaos 05:18:34.9 +23:34:09 15.4 47 Positions are for equinox of date
Star training set for 4722_Agelaos, (2026/09/08 05:15UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 11.92 58 Alnath 05:26:17.6 +28:36:22 1.6 5.48 45 108 Tau 05:15:27.6 +22:17:05 6.2 1.30 48 PPM 094241 05:17:31.7 +24:00:33 7.9 0.49 47 PPM 094215 05:15:53.8 +23:10:37 11.2 0.44 48 4722_Agelaos 05:16:57.5 +23:32:31 15.4 47 Positions are for J2000