Occultation event with (2920) Automedon, event index number 3905
Regions able to see the event: SAmericaS
Geocentric closest approach at 2026/07/29 22:09:26 UTC
J2000 position of star is 11:59:14.1 -12:47:09
Equinox of date position of star is 12:00:35.9 -12:56:02
Star is 124 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=14.6
Use an exposure time of 1.05 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 17% with SNR of 0.5 for the occulted depth (per occulted point)
Apparent velocity is 29.1 km/sec on the sky relative to the star, or, 25.7 arcsec/hr.
Position angle of asteroid motion is 97.2 degrees
The recommended exposure time corresponds to 30.6 km per image.
The 1-sigma error in the time of the event is 0.4 seconds.
The 1-sigma cross-track error in the shadow position is 40.6 km.
The sky-plane scale is 4084.7 km/arcsec.
Diameter estimates:
102.3 km assuming a 5% albedo, maximum of 3.5 sec for a central chord
41.8 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 88.6 km used for deployment plan.
Star training set for 2920_Automedon, (2026/07/29 22:09UT) Object RA Dec mag sep mel Spica 13:26:35.8 -11:17:57 1.0 21.08 106 4Gam Crv 12:17:10.6 -17:41:22 2.6 6.21 118 PPM 225013 11:52:42.9 -12:20:07 6.3 2.01 126 PPM 225246 12:02:09.1 -12:18:21 8.2 0.73 124 PPM 225220 12:01:06.0 -12:54:58 9.5 0.12 124 2920_Automedon 12:00:35.9 -12:56:02 14.6 124 Positions are for equinox of date
Star training set for 2920_Automedon, (2026/07/29 22:09UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 21.08 106 4Gam Crv 12:15:48.1 -17:32:30 2.6 6.21 118 PPM 225013 11:51:21.5 -12:11:15 6.3 2.01 126 PPM 225246 12:00:47.3 -12:09:28 8.2 0.73 124 PPM 225220 11:59:44.2 -12:46:06 9.5 0.12 124 2920_Automedon 11:59:14.1 -12:47:09 14.6 124 Positions are for J2000