Occultation event with (11252) Laertes, event index number 1428
Regions able to see the event: Europe
Geocentric closest approach at 2025/10/29 03:39:25 UTC
J2000 position of star is 11:28:25.2 +09:02:47
Equinox of date position of star is 11:29:45.4 +08:54:14
Star is 131 degrees from the moon. Moon is 45% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=16.5
Use an exposure time of 0.30 seconds with the standard RECON-QHY system.
SNR of 3.7 per integration for unocculted signal
Expected flux drop is 75% with SNR of 2.8 for the occulted depth (per occulted point)
Apparent velocity is 33.2 km/sec on the sky relative to the star, or, 28.3 arcsec/hr.
Position angle of asteroid motion is 109.9 degrees
The recommended exposure time corresponds to 10.0 km per image.
The 1-sigma error in the time of the event is 0.7 seconds.
The 1-sigma cross-track error in the shadow position is 26.5 km.
The sky-plane scale is 4227.1 km/arcsec.
Diameter estimates:
44.3 km assuming a 5% albedo, aximum of 1.3 sec for a central chord
18.1 km assuming a 30% albedo, maximum of 0.5 sec for a central chord
Cross-track diameter of 41.1 km used for deployment plan.
Star training set for 11252_Laertes, (2025/10/29 03:39UT) Object RA Dec mag sep mel Regulus 10:09:44.7 +11:50:24 1.3 19.89 150 Denebola 11:50:22.5 +14:25:39 2.1 7.48 128 PPM 128238 11:26:19.2 +11:17:17 5.8 2.53 133 PPM 157920 11:31:45.2 +08:57:58 8.1 0.50 130 PPM 157868 11:28:12.5 +08:52:41 9.7 0.38 131 PPM 157888 11:29:36.7 +09:04:18 10.9 0.17 131 11252_Laertes 11:29:45.4 +08:54:14 16.5 130 Positions are for equinox of date
Star training set for 11252_Laertes, (2025/10/29 03:39UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 19.89 150 Denebola 11:49:02.7 +14:34:16 2.1 7.48 128 PPM 128238 11:24:58.8 +11:25:49 5.8 2.53 133 PPM 157920 11:30:25.1 +09:06:31 8.1 0.50 130 PPM 157868 11:26:52.3 +09:01:13 9.7 0.38 131 PPM 157888 11:28:16.5 +09:12:51 10.9 0.17 131 11252_Laertes 11:28:25.2 +09:02:47 16.5 131 Positions are for J2000