Occultation event with (2207) Antenor, event index number 4160
Regions able to see the event: Europe
Geocentric closest approach at 2026/09/03 01:38:24 UTC
J2000 position of star is 05:49:35.3 +16:56:08
Equinox of date position of star is 05:51:08.2 +16:56:31
Star is 35 degrees from the moon. Moon is 64% illuminated.
Stellar brightness G=13.3, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.15 seconds with the standard RECON-QHY system.
SNR of 9.9 per integration for unocculted signal
Expected flux drop is 76% with SNR of 7.6 for the occulted depth (per occulted point)
Apparent velocity is 21.6 km/sec on the sky relative to the star, or, 20.2 arcsec/hr.
Position angle of asteroid motion is 96.2 degrees
The recommended exposure time corresponds to 3.2 km per image.
The 1-sigma error in the time of the event is 0.1 seconds.
The 1-sigma cross-track error in the shadow position is 42.4 km.
The sky-plane scale is 3852.8 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, maximum of 4.6 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2026/09/03 01:38UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.0 +07:24:35 0.4 9.63 40 Alhena 06:39:15.1 +16:22:27 1.9 11.54 47 126 Tau 05:42:50.2 +16:32:43 4.6 2.03 34 PPM 121438 05:51:02.9 +17:31:29 8.3 0.58 35 PPM 121416 05:49:56.2 +16:58:28 9.9 0.29 35 2207_Antenor 05:51:08.2 +16:56:31 14.6 36 Positions are for equinox of date
Star training set for 2207_Antenor, (2026/09/03 01:38UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 9.63 40 Alhena 06:37:42.8 +16:23:56 1.9 11.54 47 126 Tau 05:41:17.7 +16:32:01 4.6 2.03 34 PPM 121438 05:49:29.7 +17:31:06 8.3 0.58 35 PPM 121416 05:48:23.4 +16:58:03 9.9 0.29 35 2207_Antenor 05:49:35.3 +16:56:08 14.6 35 Positions are for J2000