Occultation event with (624) Hektor, event index number 812
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2025/03/15 05:41:16 UTC
J2000 position of star is 10:03:33.7 +16:19:56
Equinox of date position of star is 10:04:55.9 +16:12:34
Star is 38 degrees from the moon. Moon is 99% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=12.3
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
Expected flux drop is 92% with SNR of 7.3 per integration
Apparent velocity is 15.0 km/sec on the sky relative to the star, or, 17.6 arcsec/hr.
The recommended exposure time corresponds to 30.1 km per image.
The 1-sigma error in the time of the event is 2.0 seconds.
The 1-sigma cross-track error in the shadow position is 23.8 km.
The sky-plane scale is 3081.4 km/arcsec.
Diameter estimates:
200.4 km assuming a 5% albedo, aximum of 13.3 sec for a central chord
81.8 km assuming a 30% albedo, maximum of 5.4 sec for a central chord
Cross-track diameter of 200.4 km used for deployment plan.
Star training set for 624_Hektor, (2025/03/15 05:41UT) Object RA Dec mag sep mel Regulus 10:09:42.7 +11:50:35 1.3 4.52 36 PPM 127101 10:07:02.8 +15:38:02 6.2 0.77 38 PPM 127073 10:05:14.5 +16:05:35 9.7 0.14 38 624_Hektor 10:04:55.9 +16:12:34 12.3 38 Positions are for equinox of date
Star training set for 624_Hektor, (2025/03/15 05:41UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 4.52 36 PPM 127101 10:05:40.8 +15:45:26 6.2 0.77 38 PPM 127073 10:03:52.2 +16:12:57 9.7 0.14 38 624_Hektor 10:03:33.7 +16:19:56 12.3 38 Positions are for J2000