Occultation event with (2207) Antenor, event index number 1302
Regions able to see the event: Europe
Geocentric closest approach at 2025/09/22 00:54:34 UTC
J2000 position of star is 03:42:37.9 +12:21:35
Equinox of date position of star is 03:44:03.3 +12:26:25
Star is 125 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=13.1, apparent brightess of occulting body is G=14.2
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 10.0 per integration for unocculted signal
Expected flux drop is 74% with SNR of 7.4 for the occulted depth (per occulted point)
Apparent velocity is 4.8 km/sec on the sky relative to the star, or, 5.3 arcsec/hr.
Position angle of asteroid motion is 31.8 degrees
The recommended exposure time corresponds to 0.6 km per image.
The 1-sigma error in the time of the event is 7.9 seconds.
The 1-sigma cross-track error in the shadow position is 14.1 km.
The sky-plane scale is 3278.9 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, aximum of 20.6 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 8.4 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2025/09/22 00:55UT) Object RA Dec mag sep mel Aldebaran 04:37:24.0 +16:33:32 0.8 13.55 112 Menkar 03:03:37.6 +04:11:21 2.5 12.96 135 30 Tau 03:49:41.1 +11:13:14 4.8 1.84 124 PPM 119283 03:42:53.8 +12:41:18 8.4 0.38 125 PPM 119280 03:42:43.7 +12:22:39 9.9 0.33 125 2207_Antenor 03:44:03.3 +12:26:25 14.2 125 Positions are for equinox of date
Star training set for 2207_Antenor, (2025/09/22 00:55UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 13.55 112 Menkar 03:02:16.8 +04:05:21 2.5 12.96 135 30 Tau 03:48:16.3 +11:08:35 4.8 1.84 124 PPM 119283 03:41:28.4 +12:36:26 8.4 0.38 125 PPM 119280 03:41:18.4 +12:17:47 9.9 0.33 125 2207_Antenor 03:42:37.9 +12:21:35 14.2 125 Positions are for J2000