Occultation event with (2207) Antenor, event index number 1612
Regions able to see the event: Australia
Geocentric closest approach at 2025/11/29 17:37:11 UTC
J2000 position of star is 03:15:32.9 +09:48:03
Equinox of date position of star is 03:16:57.1 +09:53:44
Star is 54 degrees from the moon. Moon is 65% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=13.7
Use an exposure time of 1.55 seconds with the standard RECON-QHY system.
SNR of 3.2 per integration for unocculted signal
Expected flux drop is 9% with SNR of 0.3 for the occulted depth (per occulted point)
Apparent velocity is 15.4 km/sec on the sky relative to the star, or, 18.3 arcsec/hr.
Position angle of asteroid motion is 77.7 degrees
The recommended exposure time corresponds to 23.9 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 36.9 km.
The sky-plane scale is 3035.3 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, aximum of 6.4 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 2.6 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2025/11/29 17:37UT) Object RA Dec mag sep mel Aldebaran 04:37:24.6 +16:33:33 0.8 20.67 74 Menkar 03:03:38.2 +04:11:23 2.5 6.59 50 PPM 118883 03:12:03.9 +11:58:09 5.8 2.40 53 PPM 118926 03:15:25.1 +10:32:53 8.3 0.75 54 PPM 146368 03:16:07.6 +09:53:01 8.7 0.20 54 2207_Antenor 03:16:57.1 +09:53:44 13.7 54 Positions are for equinox of date
Star training set for 2207_Antenor, (2025/11/29 17:37UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 20.67 74 Menkar 03:02:16.8 +04:05:21 2.5 6.59 50 PPM 118883 03:10:38.8 +11:52:20 5.8 2.40 53 PPM 118926 03:14:00.6 +10:27:10 8.3 0.75 54 PPM 146368 03:14:43.4 +09:47:19 8.7 0.20 54 2207_Antenor 03:15:32.9 +09:48:03 13.7 54 Positions are for J2000