Occultation event with (624) Hektor, event index number 3807
Regions able to see the event: Australia,NZ
Geocentric closest approach at 2026/06/25 09:05:44 UTC
J2000 position of star is 11:42:13.8 -07:31:22
Equinox of date position of star is 11:43:34.9 -07:40:12
Star is 44 degrees from the moon. Moon is 82% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=13.0
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 3.3 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 14.7 km/sec on the sky relative to the star, or, 14.1 arcsec/hr.
Position angle of asteroid motion is 112.2 degrees
The recommended exposure time corresponds to 29.3 km per image.
The 1-sigma error in the time of the event is 2.4 seconds.
The 1-sigma cross-track error in the shadow position is 17.2 km.
The sky-plane scale is 3729.1 km/arcsec.
Diameter estimates:
206.1 km assuming a 5% albedo, maximum of 14.1 sec for a central chord
84.1 km assuming a 30% albedo, maximum of 5.7 sec for a central chord
Cross-track diameter of 225.0 km used for deployment plan.
Star training set for 624_Hektor, (2026/06/25 09:06UT) Object RA Dec mag sep mel Spica 13:26:35.5 -11:17:55 1.0 25.65 20 4Gam Crv 12:17:10.3 -17:41:20 2.6 12.93 33 PPM 194769 11:45:16.4 -06:49:29 6.1 0.94 44 PPM 194732 11:43:13.8 -07:05:23 8.5 0.59 44 PPM 194734 11:43:30.2 -07:53:02 9.3 0.21 44 624_Hektor 11:43:34.9 -07:40:12 13.0 44 Positions are for equinox of date
Star training set for 624_Hektor, (2026/06/25 09:06UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 25.65 20 4Gam Crv 12:15:48.1 -17:32:30 2.6 12.93 33 PPM 194769 11:43:55.2 -06:40:39 6.1 0.94 44 PPM 194732 11:41:52.7 -06:56:34 8.5 0.59 44 PPM 194734 11:42:09.2 -07:44:13 9.3 0.21 44 624_Hektor 11:42:13.8 -07:31:22 13.0 44 Positions are for J2000