Occultation event with (2207) Antenor, event index number 4002
Regions able to see the event: Europe
Geocentric closest approach at 2026/08/14 01:39:32 UTC
J2000 position of star is 05:36:42.7 +17:08:52
Equinox of date position of star is 05:38:15.5 +17:09:45
Star is 75 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.90 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 19% with SNR of 0.6 for the occulted depth (per occulted point)
Apparent velocity is 29.1 km/sec on the sky relative to the star, or, 25.9 arcsec/hr.
Position angle of asteroid motion is 92.1 degrees
The recommended exposure time corresponds to 26.2 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 43.7 km.
The sky-plane scale is 4055.6 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, maximum of 3.4 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2026/08/14 01:40UT) Object RA Dec mag sep mel Betelgeuse 05:56:36.8 +07:24:35 0.4 10.73 71 Bellatrix 05:26:33.6 +06:22:18 1.6 11.16 78 122 Tau 05:38:36.5 +17:03:15 5.7 0.14 75 PPM 121196 05:39:05.4 +16:34:13 8.3 0.62 74 122 Tau 05:38:36.5 +17:03:15 5.7 0.14 75 2207_Antenor 05:38:15.5 +17:09:45 14.6 74 Positions are for equinox of date
Star training set for 2207_Antenor, (2026/08/14 01:40UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 10.73 71 Bellatrix 05:25:07.8 +06:20:58 1.6 11.16 78 122 Tau 05:37:03.8 +17:02:24 5.7 0.14 75 PPM 121196 05:37:33.0 +16:33:22 8.3 0.62 74 122 Tau 05:37:03.8 +17:02:24 5.7 0.14 75 2207_Antenor 05:36:42.7 +17:08:52 14.6 75 Positions are for J2000