Occultation event with (2920) Automedon, event index number 963
Regions able to see the event: Australia
Geocentric closest approach at 2025/05/10 08:34:48 UTC
J2000 position of star is 09:18:24.4 -06:35:03
Equinox of date position of star is 09:19:39.9 -06:41:31
Star is 61 degrees from the moon. Moon is 95% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=14.4
Use an exposure time of 1.25 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 35% with SNR of 3.4 for the occulted depth (per occulted point)
Apparent velocity is 14.9 km/sec on the sky relative to the star, or, 15.1 arcsec/hr.
The recommended exposure time corresponds to 18.7 km per image.
The 1-sigma error in the time of the event is 2.5 seconds.
The 1-sigma cross-track error in the shadow position is 20.0 km.
The sky-plane scale is 3569.5 km/arcsec.
Diameter estimates:
101.9 km assuming a 5% albedo, aximum of 6.8 sec for a central chord
41.6 km assuming a 30% albedo, maximum of 2.8 sec for a central chord
Cross-track diameter of 101.9 km used for deployment plan.
Star training set for 2920_Automedon, (2025/05/10 08:35UT) Object RA Dec mag sep mel Regulus 10:09:43.2 +11:50:32 1.3 22.33 55 Alphard 09:28:50.0 -08:46:11 2.0 3.08 59 23 Hya 09:17:57.3 -06:27:37 5.2 0.48 62 PPM 192211 09:17:58.2 -06:49:23 8.4 0.44 62 PPM 192253 09:20:22.6 -06:36:57 8.9 0.19 61 2920_Automedon 09:19:39.9 -06:41:31 14.4 61 Positions are for equinox of date
Star training set for 2920_Automedon, (2025/05/10 08:35UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 22.33 55 Alphard 09:27:35.2 -08:39:30 2.0 3.08 59 23 Hya 09:16:41.8 -06:21:11 5.2 0.48 62 PPM 192211 09:16:42.8 -06:42:58 8.4 0.44 62 PPM 192253 09:19:07.2 -06:30:28 8.9 0.19 61 2920_Automedon 09:18:24.4 -06:35:03 14.4 61 Positions are for J2000