Occultation event with (624) Hektor, event index number 3223
Regions able to see the event: Australia
Geocentric closest approach at 2026/02/07 13:09:38 UTC
J2000 position of star is 12:17:32.7 -08:30:50
Equinox of date position of star is 12:18:53.4 -08:39:31
Star is 20 degrees from the moon. Moon is 69% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=12.5
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 4.4 per integration for unocculted signal
Expected flux drop is 5% with SNR of 0.2 for the occulted depth (per occulted point)
Apparent velocity is 9.4 km/sec on the sky relative to the star, or, 10.4 arcsec/hr.
Position angle of asteroid motion is 72.0 degrees
The recommended exposure time corresponds to 18.7 km per image.
The 1-sigma error in the time of the event is 1.6 seconds.
The 1-sigma cross-track error in the shadow position is 37.1 km.
The sky-plane scale is 3231.3 km/arcsec.
Diameter estimates:
206.1 km assuming a 5% albedo, maximum of 22.0 sec for a central chord
84.1 km assuming a 30% albedo, maximum of 9.0 sec for a central chord
Cross-track diameter of 225.0 km used for deployment plan.
Star training set for 624_Hektor, (2026/02/07 13:10UT) Object RA Dec mag sep mel Spica 13:26:34.3 -11:17:48 1.0 16.87 4 4Gam Crv 12:17:09.2 -17:41:12 2.6 9.04 19 PPM 225575 12:16:31.3 -10:27:53 6.1 1.90 20 PPM 195354 12:19:52.8 -09:02:59 7.8 0.46 19 PPM 195340 12:18:57.0 -08:32:04 9.2 0.13 20 624_Hektor 12:18:53.4 -08:39:31 12.5 19 Positions are for equinox of date
Star training set for 624_Hektor, (2026/02/07 13:10UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 16.87 4 4Gam Crv 12:15:48.1 -17:32:30 2.6 9.04 19 PPM 225575 12:15:10.6 -10:19:11 6.1 1.90 20 PPM 195354 12:18:32.1 -08:54:18 7.8 0.46 19 PPM 195340 12:17:36.3 -08:23:22 9.2 0.13 20 624_Hektor 12:17:32.7 -08:30:50 12.5 20 Positions are for J2000