Occultation event with (11552) Boucolion, event index number 719
Regions able to see the event: SAfrica
Geocentric closest approach at 2025/02/26 18:26:08 UTC
J2000 position of star is 02:28:09.8 +00:29:37
Equinox of date position of star is 02:29:27.4 +00:36:19
Star is 73 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=14.6, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
Expected flux drop is 25% with SNR of 8.5 per integration
Apparent velocity is 30.0 km/sec on the sky relative to the star, or, 27.0 arcsec/hr.
The recommended exposure time corresponds to 13.5 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 20.5 km.
The sky-plane scale is 4008.7 km/arcsec.
Diameter estimates:
57.0 km assuming a 5% albedo, aximum of 1.9 sec for a central chord
23.3 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 57.0 km used for deployment plan.
Star training set for 11552_Boucolion, (2025/02/26 18:26UT) Object RA Dec mag sep mel Aldebaran 04:37:22.0 +16:33:28 0.8 35.31 108 68Omi Cet 02:20:37.2 -02:51:53 2.0 4.11 70 PPM 145662 02:32:02.5 +00:21:58 5.7 0.69 74 PPM 145631 02:30:37.9 +00:53:40 8.4 0.41 74 PPM 145610 02:29:17.6 +00:19:59 8.9 0.28 73 11552_Boucolio 02:29:27.4 +00:36:19 15.8 74 Positions are for equinox of date
Star training set for 11552_Boucolion, (2025/02/26 18:26UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 35.31 108 68Omi Cet 02:19:20.8 -02:58:46 2.0 4.11 70 PPM 145662 02:30:45.1 +00:15:20 5.7 0.69 74 PPM 145631 02:29:20.3 +00:47:00 8.4 0.41 74 PPM 145610 02:28:00.1 +00:13:17 8.9 0.28 73 11552_Boucolio 02:28:09.8 +00:29:37 15.8 73 Positions are for J2000