Occultation event with (2920) Automedon, event index number 3356
Regions able to see the event: Australia,NZ
Geocentric closest approach at 2026/03/05 16:40:01 UTC
J2000 position of star is 11:53:33.2 -20:39:37
Equinox of date position of star is 11:54:53.3 -20:48:21
Star is 17 degrees from the moon. Moon is 95% illuminated.
Stellar brightness G=15.8, apparent brightess of occulting body is G=13.8
Use an exposure time of 1.45 seconds with the standard RECON-QHY system.
SNR of 4.9 per integration for unocculted signal
Expected flux drop is 14% with SNR of 0.7 for the occulted depth (per occulted point)
Apparent velocity is 15.1 km/sec on the sky relative to the star, or, 17.5 arcsec/hr.
Position angle of asteroid motion is 113.1 degrees
The recommended exposure time corresponds to 21.8 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 35.5 km.
The sky-plane scale is 3098.6 km/arcsec.
Diameter estimates:
102.3 km assuming a 5% albedo, maximum of 6.8 sec for a central chord
41.8 km assuming a 30% albedo, maximum of 2.8 sec for a central chord
Cross-track diameter of 88.6 km used for deployment plan.
Star training set for 2920_Automedon, (2026/03/05 16:40UT) Object RA Dec mag sep mel Spica 13:26:34.6 -11:17:50 1.0 23.95 12 4Gam Crv 12:17:09.4 -17:41:14 2.6 6.11 12 PPM 225249 12:02:11.7 -19:48:17 5.4 1.98 15 PPM 259535 11:52:10.1 -21:08:55 8.4 0.72 18 PPM 259595 11:54:46.1 -20:46:38 9.8 0.04 17 2920_Automedon 11:54:53.3 -20:48:21 13.8 17 Positions are for equinox of date
Star training set for 2920_Automedon, (2026/03/05 16:40UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 23.95 12 4Gam Crv 12:15:48.1 -17:32:30 2.6 6.11 12 PPM 225249 12:00:51.1 -19:39:32 5.4 1.98 15 PPM 259535 11:50:50.1 -21:00:10 8.4 0.72 18 PPM 259595 11:53:25.9 -20:37:54 9.8 0.04 17 2920_Automedon 11:53:33.2 -20:39:37 13.8 17 Positions are for J2000