Occultation event with (11252) Laertes, event index number 722
Regions able to see the event: Senegal
Geocentric closest approach at 2025/02/27 00:09:15 UTC
J2000 position of star is 09:24:21.9 +21:54:14
Equinox of date position of star is 09:25:47.7 +21:47:41
Star is 171 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=11.8, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
Expected flux drop is 3% with SNR of 23.5 per integration
Apparent velocity is 15.0 km/sec on the sky relative to the star, or, 17.7 arcsec/hr.
The recommended exposure time corresponds to 1.8 km per image.
The 1-sigma error in the time of the event is 2.9 seconds.
The 1-sigma cross-track error in the shadow position is 16.1 km.
The sky-plane scale is 3056.3 km/arcsec.
Diameter estimates:
43.7 km assuming a 5% albedo, aximum of 2.9 sec for a central chord
17.8 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 43.7 km used for deployment plan.
Star training set for 11252_Laertes, (2025/02/27 00:09UT) Object RA Dec mag sep mel Regulus 10:09:42.5 +11:50:36 1.3 14.46 174 4Lam Leo 09:33:09.1 +22:51:21 4.3 2.00 171 PPM 099624 09:31:48.9 +21:42:03 6.9 1.40 172 PPM 099535 09:24:44.9 +22:04:14 9.3 0.37 171 PPM 099552 09:26:17.9 +21:36:12 10.9 0.22 171 11252_Laertes 09:25:47.7 +21:47:41 15.6 171 Positions are for equinox of date
Star training set for 11252_Laertes, (2025/02/27 00:09UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 14.46 174 4Lam Leo 09:31:43.2 +22:58:04 4.3 2.00 171 PPM 099624 09:30:23.5 +21:48:45 6.9 1.40 172 PPM 099535 09:23:19.0 +22:10:46 9.3 0.37 171 PPM 099552 09:24:52.2 +21:42:46 10.9 0.22 171 11252_Laertes 09:24:21.9 +21:54:14 15.6 171 Positions are for J2000