Occultation event with (11252) Laertes, event index number 3319
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/02/26 23:15:51 UTC
J2000 position of star is 11:50:14.6 +08:51:54
Equinox of date position of star is 11:51:35.2 +08:43:10
Star is 73 degrees from the moon. Moon is 77% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.65 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 37% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 15.9 km/sec on the sky relative to the star, or, 18.5 arcsec/hr.
Position angle of asteroid motion is 117.0 degrees
The recommended exposure time corresponds to 10.3 km per image.
The 1-sigma error in the time of the event is 1.9 seconds.
The 1-sigma cross-track error in the shadow position is 24.1 km.
The sky-plane scale is 3096.3 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, (2026/02/26 23:16UT) Object RA Dec mag sep mel Regulus 10:09:45.7 +11:50:18 1.3 25.23 49 Denebola 11:50:23.6 +14:25:33 2.1 5.71 70 4 Vir 11:49:15.5 +08:06:02 5.2 0.85 73 PPM 158279 11:53:17.1 +08:40:35 8.0 0.42 74 PPM 158240 11:50:59.5 +08:22:27 9.9 0.38 73 11252_Laertes 11:51:35.2 +08:43:10 15.5 74 Positions are for equinox of date
Star training set for 11252_Laertes, (2026/02/26 23:16UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 25.23 49 Denebola 11:49:02.7 +14:34:16 2.1 5.71 70 4 Vir 11:47:54.8 +08:14:45 5.2 0.85 73 PPM 158279 11:51:56.5 +08:49:19 8.0 0.42 74 PPM 158240 11:49:38.8 +08:31:10 9.9 0.38 73 11252_Laertes 11:50:14.6 +08:51:54 15.5 73 Positions are for J2000