Occultation event with (624) Hektor, event index number 1512
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/11/14 07:32:30 UTC
J2000 position of star is 11:58:20.1 -02:48:16
Equinox of date position of star is 11:59:39.6 -02:56:55
Star is 14 degrees from the moon. Moon is 29% illuminated.
Stellar brightness G=11.9, apparent brightess of occulting body is G=13.1
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 21.0 per integration for unocculted signal
Expected flux drop is 75% with SNR of 15.8 for the occulted depth (per occulted point)
Apparent velocity is 31.6 km/sec on the sky relative to the star, or, 27.4 arcsec/hr.
Position angle of asteroid motion is 122.8 degrees
The recommended exposure time corresponds to 3.8 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 11.1 km.
The sky-plane scale is 4143.1 km/arcsec.
Diameter estimates:
206.1 km assuming a 5% albedo, aximum of 6.5 sec for a central chord
84.1 km assuming a 30% albedo, maximum of 2.7 sec for a central chord
Cross-track diameter of 225.0 km used for deployment plan.
Star training set for 624_Hektor, (2025/11/14 07:33UT) Object RA Dec mag sep mel Spica 13:26:33.6 -11:17:44 1.0 23.10 37 4Gam Crv 12:17:08.4 -17:41:08 2.6 15.35 28 PPM 178683 12:07:19.4 -03:16:33 6.4 1.94 16 PPM 195036 12:00:34.1 -03:28:01 7.6 0.57 15 PPM 178639 11:58:00.6 -02:55:26 10.0 0.41 14 624_Hektor 11:59:39.6 -02:56:55 13.1 15 Positions are for equinox of date
Star training set for 624_Hektor, (2025/11/14 07:33UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 23.10 37 4Gam Crv 12:15:48.1 -17:32:30 2.6 15.35 28 PPM 178683 12:05:59.8 -03:07:54 6.4 1.94 16 PPM 195036 11:59:14.6 -03:19:22 7.6 0.57 15 PPM 178639 11:56:41.0 -02:46:47 10.0 0.41 14 624_Hektor 11:58:20.1 -02:48:16 13.1 14 Positions are for J2000