Occultation event with (2920) Automedon, event index number 3591
Regions able to see the event: SAmericaS
Geocentric closest approach at 2026/04/07 04:13:03 UTC
J2000 position of star is 11:38:20.1 -18:18:52
Equinox of date position of star is 11:39:39.8 -18:27:36
Star is 71 degrees from the moon. Moon is 77% illuminated.
Stellar brightness G=14.0, apparent brightess of occulting body is G=13.8
Use an exposure time of 0.35 seconds with the standard RECON-QHY system.
SNR of 9.3 per integration for unocculted signal
Expected flux drop is 43% with SNR of 4.0 for the occulted depth (per occulted point)
Apparent velocity is 17.1 km/sec on the sky relative to the star, or, 20.1 arcsec/hr.
Position angle of asteroid motion is 132.9 degrees
The recommended exposure time corresponds to 6.0 km per image.
The 1-sigma error in the time of the event is 2.0 seconds.
The 1-sigma cross-track error in the shadow position is 24.7 km.
The sky-plane scale is 3070.5 km/arcsec.
Diameter estimates:
102.3 km assuming a 5% albedo, maximum of 6.0 sec for a central chord
41.8 km assuming a 30% albedo, maximum of 2.4 sec for a central chord
Cross-track diameter of 88.6 km used for deployment plan.
Star training set for 2920_Automedon, (2026/04/07 04:13UT) Object RA Dec mag sep mel Spica 13:26:34.8 -11:17:51 1.0 26.77 50 4Gam Crv 12:17:09.6 -17:41:15 2.6 8.94 63 27Zet Crt 11:46:05.9 -18:29:49 4.7 1.53 70 PPM 224682 11:39:24.5 -18:20:14 7.8 0.14 71 2920_Automedon 11:39:39.8 -18:27:36 13.8 71 Positions are for equinox of date
Star training set for 2920_Automedon, (2026/04/07 04:13UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 26.77 50 4Gam Crv 12:15:48.1 -17:32:30 2.6 8.94 63 27Zet Crt 11:44:45.8 -18:21:03 4.7 1.53 70 PPM 224682 11:38:04.8 -18:11:30 7.8 0.14 71 2920_Automedon 11:38:20.1 -18:18:52 13.8 71 Positions are for J2000