Occultation event with (2920) Automedon, event index number 798
Regions able to see the event: Australia,NZ
Geocentric closest approach at 2025/03/11 10:13:14 UTC
J2000 position of star is 09:18:41.8 -10:54:50
Equinox of date position of star is 09:19:55.0 -11:01:16
Star is 29 degrees from the moon. Moon is 92% illuminated.
Stellar brightness G=16.5, apparent brightess of occulting body is G=13.9
Use an exposure time of 1.75 seconds with the standard RECON-QHY system.
Expected flux drop is 92% with SNR of 3.0 per integration
Apparent velocity is 15.2 km/sec on the sky relative to the star, or, 17.8 arcsec/hr.
The recommended exposure time corresponds to 26.6 km per image.
The 1-sigma error in the time of the event is 2.2 seconds.
The 1-sigma cross-track error in the shadow position is 24.6 km.
The sky-plane scale is 3074.0 km/arcsec.
Diameter estimates:
100.5 km assuming a 5% albedo, aximum of 6.6 sec for a central chord
41.0 km assuming a 30% albedo, maximum of 2.7 sec for a central chord
Cross-track diameter of 100.5 km used for deployment plan.
Star training set for 2920_Automedon, (2025/03/11 10:13UT) Object RA Dec mag sep mel Regulus 10:09:42.7 +11:50:35 1.3 25.99 11 Alphard 09:28:49.5 -08:46:08 2.0 3.14 27 26 Hya 09:20:59.2 -12:04:57 4.1 1.09 30 PPM 221370 09:20:59.3 -11:18:05 8.5 0.38 30 PPM 221345 09:19:32.0 -11:11:17 9.2 0.19 30 2920_Automedon 09:19:55.0 -11:01:16 13.9 29 Positions are for equinox of date
Star training set for 2920_Automedon, (2025/03/11 10:13UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 25.99 11 Alphard 09:27:35.2 -08:39:30 2.0 3.14 27 26 Hya 09:19:46.3 -11:58:29 4.1 1.09 30 PPM 221370 09:19:46.1 -11:11:38 8.5 0.38 30 PPM 221345 09:18:18.8 -11:04:52 9.2 0.19 30 2920_Automedon 09:18:41.8 -10:54:50 13.9 29 Positions are for J2000