Occultation event with (2207) Antenor, event index number 4372
Regions able to see the event: Europe
Geocentric closest approach at 2026/10/09 22:38:26 UTC
J2000 position of star is 06:02:47.0 +16:14:51
Equinox of date position of star is 06:04:19.7 +16:14:43
Star is 97 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=14.3
Use an exposure time of 1.85 seconds with the standard RECON-QHY system.
SNR of 9.9 per integration for unocculted signal
Expected flux drop is 29% with SNR of 2.9 for the occulted depth (per occulted point)
Apparent velocity is 5.4 km/sec on the sky relative to the star, or, 5.7 arcsec/hr.
Position angle of asteroid motion is 123.5 degrees
The recommended exposure time corresponds to 10.0 km per image.
The 1-sigma error in the time of the event is 4.1 seconds.
The 1-sigma cross-track error in the shadow position is 36.1 km.
The sky-plane scale is 3442.6 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, maximum of 18.2 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 7.4 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2026/10/09 22:38UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.3 +07:24:35 0.4 9.03 98 Alhena 06:39:15.5 +16:22:27 1.9 8.38 88 69 Ori 06:13:35.9 +16:07:18 4.7 2.23 95 PPM 121837 06:05:22.4 +16:43:44 8.2 0.54 97 PPM 121776 06:03:11.0 +16:07:24 10.0 0.30 97 PPM 121794 06:03:50.0 +16:14:01 10.9 0.12 97 2207_Antenor 06:04:19.7 +16:14:43 14.3 96 Positions are for equinox of date
Star training set for 2207_Antenor, (2026/10/09 22:38UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 9.03 98 Alhena 06:37:42.8 +16:23:56 1.9 8.38 88 69 Ori 06:12:03.2 +16:07:48 4.7 2.23 95 PPM 121837 06:03:49.4 +16:43:55 8.2 0.54 97 PPM 121776 06:01:38.4 +16:07:30 10.0 0.30 97 PPM 121794 06:02:17.2 +16:14:08 10.9 0.12 97 2207_Antenor 06:02:47.0 +16:14:51 14.3 97 Positions are for J2000