Occultation event with (624) Hektor, event index number 3247
Regions able to see the event: Australia
Geocentric closest approach at 2026/02/14 17:49:17 UTC
J2000 position of star is 12:15:19.2 -08:38:04
Equinox of date position of star is 12:16:40.0 -08:46:47
Star is 106 degrees from the moon. Moon is 8% illuminated.
Stellar brightness G=13.4, apparent brightess of occulting body is G=12.4
Use an exposure time of 0.25 seconds with the standard RECON-QHY system.
SNR of 9.7 per integration for unocculted signal
Expected flux drop is 29% with SNR of 2.8 for the occulted depth (per occulted point)
Apparent velocity is 11.5 km/sec on the sky relative to the star, or, 13.1 arcsec/hr.
Position angle of asteroid motion is 82.1 degrees
The recommended exposure time corresponds to 2.9 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 34.0 km.
The sky-plane scale is 3172.2 km/arcsec.
Diameter estimates:
206.1 km assuming a 5% albedo, maximum of 17.9 sec for a central chord
84.1 km assuming a 30% albedo, maximum of 7.3 sec for a central chord
Cross-track diameter of 225.0 km used for deployment plan.
Star training set for 624_Hektor, (2026/02/14 17:49UT) Object RA Dec mag sep mel Spica 13:26:34.4 -11:17:49 1.0 17.39 90 4Gam Crv 12:17:09.2 -17:41:13 2.6 8.91 101 PPM 225575 12:16:31.4 -10:27:53 6.1 1.69 105 PPM 195297 12:15:58.4 -09:08:07 8.2 0.39 106 PPM 195300 12:16:17.6 -08:46:04 9.2 0.09 106 624_Hektor 12:16:40.0 -08:46:47 12.4 106 Positions are for equinox of date
Star training set for 624_Hektor, (2026/02/14 17:49UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 17.39 90 4Gam Crv 12:15:48.1 -17:32:30 2.6 8.91 101 PPM 225575 12:15:10.6 -10:19:11 6.1 1.69 105 PPM 195297 12:14:37.7 -08:59:25 8.2 0.39 106 PPM 195300 12:14:56.9 -08:37:21 9.2 0.09 106 624_Hektor 12:15:19.2 -08:38:04 12.4 106 Positions are for J2000