Occultation event with (2920) Automedon, event index number 3535
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2026/03/29 06:59:15 UTC
J2000 position of star is 11:42:14.9 -19:05:37
Equinox of date position of star is 11:43:34.7 -19:14:21
Star is 45 degrees from the moon. Moon is 85% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=13.7
Use an exposure time of 1.25 seconds with the standard RECON-QHY system.
SNR of 3.3 per integration for unocculted signal
Expected flux drop is 10% with SNR of 0.3 for the occulted depth (per occulted point)
Apparent velocity is 17.5 km/sec on the sky relative to the star, or, 20.7 arcsec/hr.
Position angle of asteroid motion is 127.3 degrees
The recommended exposure time corresponds to 21.9 km per image.
The 1-sigma error in the time of the event is 1.8 seconds.
The 1-sigma cross-track error in the shadow position is 27.9 km.
The sky-plane scale is 3056.1 km/arcsec.
Diameter estimates:
102.3 km assuming a 5% albedo, maximum of 5.8 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, (2026/03/29 06:59UT) Object RA Dec mag sep mel Spica 13:26:34.8 -11:17:51 1.0 26.04 61 4Gam Crv 12:17:09.6 -17:41:15 2.6 8.11 50 27Zet Crt 11:46:05.8 -18:29:48 4.7 0.95 45 PPM 224830 11:45:15.3 -18:42:30 8.5 0.66 45 PPM 224779 11:43:24.5 -18:58:02 9.5 0.27 45 2920_Automedon 11:43:34.7 -19:14:21 13.7 45 Positions are for equinox of date
Star training set for 2920_Automedon, (2026/03/29 06:59UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 26.04 61 4Gam Crv 12:15:48.1 -17:32:30 2.6 8.11 50 27Zet Crt 11:44:45.8 -18:21:03 4.7 0.95 45 PPM 224830 11:43:55.4 -18:33:46 8.5 0.66 45 PPM 224779 11:42:04.7 -18:49:17 9.5 0.27 45 2920_Automedon 11:42:14.9 -19:05:37 13.7 45 Positions are for J2000