Occultation event with (11252) Laertes, event index number 3524
Regions able to see the event: SAmericaN,SAfrica
Geocentric closest approach at 2026/03/28 01:47:58 UTC
J2000 position of star is 11:36:11.0 +10:21:43
Equinox of date position of star is 11:37:32.3 +10:12:59
Star is 44 degrees from the moon. Moon is 74% illuminated.
Stellar brightness G=14.2, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.35 seconds with the standard RECON-QHY system.
SNR of 10.0 per integration for unocculted signal
Expected flux drop is 78% with SNR of 7.8 for the occulted depth (per occulted point)
Apparent velocity is 15.9 km/sec on the sky relative to the star, or, 18.4 arcsec/hr.
Position angle of asteroid motion is 109.7 degrees
The recommended exposure time corresponds to 5.5 km per image.
The 1-sigma error in the time of the event is 1.6 seconds.
The 1-sigma cross-track error in the shadow position is 27.2 km.
The sky-plane scale is 3095.9 km/arcsec.
Diameter estimates:
44.3 km assuming a 5% albedo, maximum of 2.8 sec for a central chord
18.1 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 41.1 km used for deployment plan.
Star training set for 11252_Laertes, (2026/03/28 01:48UT) Object RA Dec mag sep mel Regulus 10:09:46.0 +11:50:17 1.3 21.59 23 Denebola 11:50:23.8 +14:25:31 2.1 5.25 46 1Ome Vir 11:39:48.7 +07:59:20 6.5 2.30 45 PPM 128383 11:37:04.9 +10:45:57 6.9 0.56 44 PPM 128405 11:38:18.1 +10:21:55 8.6 0.24 44 11252_Laertes 11:37:32.3 +10:12:59 15.5 44 Positions are for equinox of date
Star training set for 11252_Laertes, (2026/03/28 01:48UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 21.59 23 Denebola 11:49:02.7 +14:34:16 2.1 5.25 46 1Ome Vir 11:38:27.6 +08:08:04 6.5 2.30 45 PPM 128383 11:35:43.5 +10:54:40 6.9 0.56 44 PPM 128405 11:36:56.8 +10:30:38 8.6 0.24 44 11252_Laertes 11:36:11.0 +10:21:43 15.5 44 Positions are for J2000