Occultation event with (2207) Antenor, event index number 4551
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/11/03 02:31:13 UTC
J2000 position of star is 06:01:56.3 +15:46:01
Equinox of date position of star is 06:03:29.0 +15:45:55
Star is 57 degrees from the moon. Moon is 36% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=14.1
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 3.9 per integration for unocculted signal
Expected flux drop is 11% with SNR of 0.4 for the occulted depth (per occulted point)
Apparent velocity is 6.9 km/sec on the sky relative to the star, or, 7.7 arcsec/hr.
Position angle of asteroid motion is 69.6 degrees
The recommended exposure time corresponds to 13.8 km per image.
The 1-sigma error in the time of the event is 2.4 seconds.
The 1-sigma cross-track error in the shadow position is 39.0 km.
The sky-plane scale is 3202.9 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, maximum of 14.3 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 5.9 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2026/11/03 02:31UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.5 +07:24:35 0.4 8.52 59 Alhena 06:39:15.7 +16:22:26 1.9 8.62 48 69 Ori 06:13:36.1 +16:07:18 4.7 2.46 54 PPM 121788 06:03:35.1 +15:12:16 8.2 0.56 57 PPM 121776 06:03:11.3 +16:07:24 10.0 0.37 57 PPM 121785 06:03:26.7 +15:37:41 10.1 0.14 57 2207_Antenor 06:03:29.0 +15:45:55 14.1 56 Positions are for equinox of date
Star training set for 2207_Antenor, (2026/11/03 02:31UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 8.52 59 Alhena 06:37:42.8 +16:23:56 1.9 8.62 48 69 Ori 06:12:03.2 +16:07:48 4.7 2.46 54 PPM 121788 06:02:02.9 +15:12:23 8.2 0.56 57 PPM 121776 06:01:38.4 +16:07:30 10.0 0.37 57 PPM 121785 06:01:54.2 +15:37:47 10.1 0.14 57 2207_Antenor 06:01:56.3 +15:46:01 14.1 57 Positions are for J2000