Occultation event with (624) Hektor, event index number 3566
Regions able to see the event: Europe
Geocentric closest approach at 2026/04/01 19:45:34 UTC
J2000 position of star is 11:52:13.0 -08:01:57
Equinox of date position of star is 11:53:33.5 -08:10:43
Star is 9 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=14.8, apparent brightess of occulting body is G=12.1
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 8.3 per integration for unocculted signal
Expected flux drop is 8% with SNR of 0.6 for the occulted depth (per occulted point)
Apparent velocity is 17.0 km/sec on the sky relative to the star, or, 20.2 arcsec/hr.
Position angle of asteroid motion is 102.7 degrees
The recommended exposure time corresponds to 34.1 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 24.0 km.
The sky-plane scale is 3030.1 km/arcsec.
Diameter estimates:
206.1 km assuming a 5% albedo, maximum of 12.1 sec for a central chord
84.1 km assuming a 30% albedo, maximum of 4.9 sec for a central chord
Cross-track diameter of 225.0 km used for deployment plan.
Star training set for 624_Hektor, (2026/04/01 19:46UT) Object RA Dec mag sep mel Spica 13:26:34.8 -11:17:51 1.0 23.12 15 4Gam Crv 12:17:09.6 -17:41:15 2.6 11.11 12 PPM 194769 11:45:15.7 -06:49:24 6.1 2.46 11 PPM 194893 11:52:31.5 -08:08:16 7.1 0.26 10 PPM 194920 11:53:56.7 -08:04:43 9.4 0.14 9 624_Hektor 11:53:33.5 -08:10:43 12.1 9 Positions are for equinox of date
Star training set for 624_Hektor, (2026/04/01 19:46UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 23.12 15 4Gam Crv 12:15:48.1 -17:32:30 2.6 11.11 12 PPM 194769 11:43:55.2 -06:40:39 6.1 2.46 11 PPM 194893 11:51:11.0 -07:59:31 7.1 0.26 10 PPM 194920 11:52:36.1 -07:55:57 9.4 0.14 9 624_Hektor 11:52:13.0 -08:01:57 12.1 9 Positions are for J2000