Occultation event with (2207) Antenor, event index number 4115
Regions able to see the event: NMexico
Geocentric closest approach at 2026/08/28 11:37:42 UTC
J2000 position of star is 05:46:19.6 +17:00:39
Equinox of date position of star is 05:47:52.5 +17:01:09
Star is 108 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=13.7, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.20 seconds with the standard RECON-QHY system.
SNR of 9.4 per integration for unocculted signal
Expected flux drop is 71% with SNR of 6.6 for the occulted depth (per occulted point)
Apparent velocity is 23.8 km/sec on the sky relative to the star, or, 21.9 arcsec/hr.
Position angle of asteroid motion is 94.9 degrees
The recommended exposure time corresponds to 4.8 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 42.3 km.
The sky-plane scale is 3912.1 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, maximum of 4.1 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2026/08/28 11:38UT) Object RA Dec mag sep mel Betelgeuse 05:56:36.9 +07:24:35 0.4 9.84 109 Bellatrix 05:26:33.7 +06:22:18 1.6 11.85 102 126 Tau 05:42:50.2 +16:32:43 4.6 1.30 107 PPM 121412 05:49:45.1 +17:30:13 8.2 0.66 108 PPM 121374 05:47:40.1 +17:16:38 9.0 0.26 108 2207_Antenor 05:47:52.5 +17:01:09 14.6 108 Positions are for equinox of date
Star training set for 2207_Antenor, (2026/08/28 11:38UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 9.84 109 Bellatrix 05:25:07.8 +06:20:58 1.6 11.85 102 126 Tau 05:41:17.7 +16:32:01 4.6 1.30 107 PPM 121412 05:48:11.9 +17:29:47 8.2 0.66 108 PPM 121374 05:46:07.1 +17:16:07 9.0 0.26 108 2207_Antenor 05:46:19.6 +17:00:39 14.6 108 Positions are for J2000