Occultation event with (11252) Laertes, event index number 907
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2025/04/16 01:14:35 UTC
J2000 position of star is 09:13:15.7 +22:11:02
Equinox of date position of star is 09:14:42.5 +22:04:42
Star is 106 degrees from the moon. Moon is 92% illuminated.
Stellar brightness G=16.8, apparent brightess of occulting body is G=16.1
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 3.8 per integration for unocculted signal
Expected flux drop is 36% with SNR of 1.3 for the occulted depth (per occulted point)
Apparent velocity is 3.9 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The recommended exposure time corresponds to 7.7 km per image.
The 1-sigma error in the time of the event is 6.1 seconds.
The 1-sigma cross-track error in the shadow position is 38.2 km.
The sky-plane scale is 3448.5 km/arcsec.
Diameter estimates:
43.8 km assuming a 5% albedo, aximum of 11.4 sec for a central chord
17.9 km assuming a 30% albedo, maximum of 4.6 sec for a central chord
Cross-track diameter of 43.8 km used for deployment plan.
Star training set for 11252_Laertes, (2025/04/16 01:15UT) Object RA Dec mag sep mel Regulus 10:09:43.0 +11:50:33 1.3 16.65 90 PPM 099404 09:15:03.7 +21:10:39 6.1 0.90 105 79 Cnc 09:11:47.8 +21:53:32 6.9 0.70 106 PPM 099425 09:16:19.8 +22:36:19 9.4 0.65 105 PPM 099407 09:15:18.4 +22:14:40 10.2 0.22 106 11252_Laertes 09:14:42.5 +22:04:42 16.1 105 Positions are for equinox of date
Star training set for 11252_Laertes, (2025/04/16 01:15UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 16.65 90 PPM 099404 09:13:37.2 +21:16:59 6.1 0.90 105 79 Cnc 09:10:20.8 +21:59:47 6.9 0.70 106 PPM 099425 09:14:52.7 +22:42:41 9.4 0.65 105 PPM 099407 09:13:51.5 +22:21:00 10.2 0.22 106 11252_Laertes 09:13:15.7 +22:11:02 16.1 106 Positions are for J2000