Occultation event with (2207) Antenor, event index number 4071
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/08/22 03:11:39 UTC
J2000 position of star is 05:42:17.5 +17:04:56
Equinox of date position of star is 05:43:50.3 +17:05:36
Star is 168 degrees from the moon. Moon is 69% illuminated.
Stellar brightness G=16.6, apparent brightess of occulting body is G=14.6
Use an exposure time of 1.40 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 15% with SNR of 0.4 for the occulted depth (per occulted point)
Apparent velocity is 26.2 km/sec on the sky relative to the star, or, 23.7 arcsec/hr.
Position angle of asteroid motion is 93.6 degrees
The recommended exposure time corresponds to 36.7 km per image.
The 1-sigma error in the time of the event is 0.0 seconds.
The 1-sigma cross-track error in the shadow position is 42.4 km.
The sky-plane scale is 3977.2 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, maximum of 3.8 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2026/08/22 03:12UT) Object RA Dec mag sep mel Betelgeuse 05:56:36.9 +07:24:35 0.4 10.17 158 Bellatrix 05:26:33.7 +06:22:18 1.6 11.52 158 126 Tau 05:42:50.1 +16:32:43 4.6 0.60 167 PPM 121255 05:42:21.2 +17:12:28 8.4 0.37 168 PPM 121273 05:43:10.9 +17:05:23 9.9 0.16 168 2207_Antenor 05:43:50.3 +17:05:36 14.6 168 Positions are for equinox of date
Star training set for 2207_Antenor, (2026/08/22 03:12UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 10.17 158 Bellatrix 05:25:07.8 +06:20:58 1.6 11.52 158 126 Tau 05:41:17.7 +16:32:01 4.6 0.60 167 PPM 121255 05:40:48.3 +17:11:45 8.4 0.37 168 PPM 121273 05:41:38.1 +17:04:42 9.9 0.16 168 2207_Antenor 05:42:17.5 +17:04:56 14.6 168 Positions are for J2000