Occultation event with (2207) Antenor, event index number 3963
Regions able to see the event: Australia
Geocentric closest approach at 2026/08/08 21:51:45 UTC
J2000 position of star is 05:32:54.1 +17:10:30
Equinox of date position of star is 05:34:26.9 +17:11:31
Star is 11 degrees from the moon. Moon is 20% illuminated.
Stellar brightness G=16.5, apparent brightess of occulting body is G=14.7
Use an exposure time of 1.25 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 16% with SNR of 0.5 for the occulted depth (per occulted point)
Apparent velocity is 30.9 km/sec on the sky relative to the star, or, 27.1 arcsec/hr.
Position angle of asteroid motion is 91.2 degrees
The recommended exposure time corresponds to 38.6 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 4103.0 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, maximum of 3.2 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2026/08/08 21:52UT) Object RA Dec mag sep mel Betelgeuse 05:56:36.8 +07:24:35 0.4 11.18 21 Bellatrix 05:26:33.6 +06:22:18 1.6 10.99 22 PPM 121072 05:33:46.8 +17:04:32 6.1 0.20 11 2207_Antenor 05:34:26.9 +17:11:31 14.7 11 Positions are for equinox of date
Star training set for 2207_Antenor, (2026/08/08 21:52UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 11.18 21 Bellatrix 05:25:07.8 +06:20:58 1.6 10.99 22 PPM 121072 05:32:14.1 +17:03:29 6.1 0.20 11 2207_Antenor 05:32:54.1 +17:10:30 14.7 11 Positions are for J2000