Occultation event with (2207) Antenor, event index number 4273
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/09/20 05:12:45 UTC
J2000 position of star is 05:57:41.0 +16:38:47
Equinox of date position of star is 05:59:13.8 +16:38:51
Star is 164 degrees from the moon. Moon is 63% illuminated.
Stellar brightness G=15.6, apparent brightess of occulting body is G=14.5
Use an exposure time of 1.70 seconds with the standard RECON-QHY system.
SNR of 7.9 per integration for unocculted signal
Expected flux drop is 27% with SNR of 2.2 for the occulted depth (per occulted point)
Apparent velocity is 14.1 km/sec on the sky relative to the star, or, 13.9 arcsec/hr.
Position angle of asteroid motion is 101.8 degrees
The recommended exposure time corresponds to 24.1 km per image.
The 1-sigma error in the time of the event is 0.5 seconds.
The 1-sigma cross-track error in the shadow position is 42.0 km.
The sky-plane scale is 3662.8 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, maximum of 7.0 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 2.8 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2026/09/20 05:13UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.2 +07:24:35 0.4 9.26 156 Alhena 06:39:15.3 +16:22:27 1.9 9.60 169 137 Tau 05:53:53.4 +14:10:34 5.5 2.79 161 PPM 121686 06:00:12.8 +16:35:55 7.7 0.24 164 PPM 121660 05:59:13.0 +16:50:16 11.7 0.19 164 2207_Antenor 05:59:13.8 +16:38:51 14.5 164 Positions are for equinox of date
Star training set for 2207_Antenor, (2026/09/20 05:13UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 9.26 156 Alhena 06:37:42.8 +16:23:56 1.9 9.60 169 137 Tau 05:52:22.2 +14:10:18 5.5 2.79 161 PPM 121686 05:58:40.0 +16:35:54 7.7 0.24 164 PPM 121660 05:57:40.0 +16:50:13 11.7 0.19 164 2207_Antenor 05:57:41.0 +16:38:47 14.5 164 Positions are for J2000