Occultation event with (4835) Asaeus, event index number 809
Regions able to see the event: SAfrica
Geocentric closest approach at 2025/03/15 00:03:21 UTC
J2000 position of star is 11:28:13.3 +22:05:04
Equinox of date position of star is 11:29:32.6 +21:56:44
Star is 26 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=12.6, apparent brightess of occulting body is G=14.5
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
Expected flux drop is 15% with SNR of 13.9 per integration
Apparent velocity is 14.4 km/sec on the sky relative to the star, or, 22.3 arcsec/hr.
The recommended exposure time corresponds to 1.7 km per image.
The 1-sigma error in the time of the event is 2.6 seconds.
The 1-sigma cross-track error in the shadow position is 21.9 km.
The sky-plane scale is 2319.9 km/arcsec.
Diameter estimates:
45.1 km assuming a 5% albedo, aximum of 3.1 sec for a central chord
18.4 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 45.1 km used for deployment plan.
Star training set for 4835_Asaeus, (2025/03/15 00:03UT) Object RA Dec mag sep mel Regulus 10:09:42.7 +11:50:35 1.3 21.57 33 68Del Leo 11:15:26.7 +20:23:07 2.6 3.64 26 92 Leo 11:42:05.5 +21:12:45 5.3 3.01 24 PPM 101167 11:28:22.5 +21:42:44 8.0 0.36 25 4835_Asaeus 11:29:32.6 +21:56:44 14.5 25 Positions are for equinox of date
Star training set for 4835_Asaeus, (2025/03/15 00:03UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 21.57 33 68Del Leo 11:14:06.7 +20:31:22 2.6 3.64 26 92 Leo 11:40:46.9 +21:21:08 5.3 3.01 24 PPM 101167 11:27:03.1 +21:51:04 8.0 0.36 25 4835_Asaeus 11:28:13.3 +22:05:04 14.5 25 Positions are for J2000