Occultation event with (2920) Automedon, event index number 3435
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/03/15 07:43:55 UTC
J2000 position of star is 11:48:58.5 -20:07:55
Equinox of date position of star is 11:50:18.5 -20:16:39
Star is 120 degrees from the moon. Moon is 15% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=13.7
Use an exposure time of 1.30 seconds with the standard RECON-QHY system.
SNR of 9.1 per integration for unocculted signal
Expected flux drop is 24% with SNR of 2.1 for the occulted depth (per occulted point)
Apparent velocity is 16.7 km/sec on the sky relative to the star, or, 19.6 arcsec/hr.
Position angle of asteroid motion is 119.1 degrees
The recommended exposure time corresponds to 21.7 km per image.
The 1-sigma error in the time of the event is 1.6 seconds.
The 1-sigma cross-track error in the shadow position is 32.9 km.
The sky-plane scale is 3067.2 km/arcsec.
Diameter estimates:
102.3 km assuming a 5% albedo, maximum of 6.1 sec for a central chord
41.8 km assuming a 30% albedo, maximum of 2.5 sec for a central chord
Cross-track diameter of 88.6 km used for deployment plan.
Star training set for 2920_Automedon, (2026/03/15 07:44UT) Object RA Dec mag sep mel Spica 13:26:34.6 -11:17:50 1.0 24.80 105 4Gam Crv 12:17:09.5 -17:41:14 2.6 6.85 116 27Zet Crt 11:46:05.7 -18:29:48 4.7 2.04 122 PPM 224918 11:49:05.4 -19:32:48 8.5 0.79 120 PPM 259496 11:50:27.9 -20:12:08 9.9 0.08 120 2920_Automedon 11:50:18.5 -20:16:39 13.7 119 Positions are for equinox of date
Star training set for 2920_Automedon, (2026/03/15 07:44UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 24.80 105 4Gam Crv 12:15:48.1 -17:32:30 2.6 6.85 116 27Zet Crt 11:44:45.8 -18:21:03 4.7 2.04 122 PPM 224918 11:47:45.4 -19:24:04 8.5 0.79 120 PPM 259496 11:49:07.9 -20:03:23 9.9 0.08 120 2920_Automedon 11:48:58.5 -20:07:55 13.7 120 Positions are for J2000