Occultation event with (2207) Antenor, event index number 4301
Regions able to see the event: Europe
Geocentric closest approach at 2026/09/25 00:21:43 UTC
J2000 position of star is 05:59:22.0 +16:33:11
Equinox of date position of star is 06:00:54.8 +16:33:11
Star is 109 degrees from the moon. Moon is 97% illuminated.
Stellar brightness G=14.3, apparent brightess of occulting body is G=14.5
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 9.7 per integration for unocculted signal
Expected flux drop is 53% with SNR of 5.2 for the occulted depth (per occulted point)
Apparent velocity is 12.0 km/sec on the sky relative to the star, or, 12.0 arcsec/hr.
Position angle of asteroid motion is 104.3 degrees
The recommended exposure time corresponds to 5.4 km per image.
The 1-sigma error in the time of the event is 0.8 seconds.
The 1-sigma cross-track error in the shadow position is 42.4 km.
The sky-plane scale is 3608.7 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, maximum of 8.2 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 3.4 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2026/09/25 00:22UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.2 +07:24:35 0.4 9.20 107 Alhena 06:39:15.4 +16:22:27 1.9 9.19 118 137 Tau 05:53:53.5 +14:10:34 5.5 2.92 107 PPM 121686 06:00:12.8 +16:35:55 7.7 0.17 108 2207_Antenor 06:00:54.8 +16:33:11 14.5 109 Positions are for equinox of date
Star training set for 2207_Antenor, (2026/09/25 00:22UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 9.20 107 Alhena 06:37:42.8 +16:23:56 1.9 9.19 118 137 Tau 05:52:22.2 +14:10:18 5.5 2.92 107 PPM 121686 05:58:40.0 +16:35:54 7.7 0.17 108 2207_Antenor 05:59:22.0 +16:33:11 14.5 109 Positions are for J2000