Occultation event with (2207) Antenor, event index number 5098
Regions able to see the event: Australia
Geocentric closest approach at 2026/12/07 16:06:15 UTC
J2000 position of star is 05:48:12.0 +15:20:19
Equinox of date position of star is 05:49:44.7 +15:20:45
Star is 150 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=14.2, apparent brightess of occulting body is G=13.6
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 9.7 per integration for unocculted signal
Expected flux drop is 37% with SNR of 3.5 for the occulted depth (per occulted point)
Apparent velocity is 16.4 km/sec on the sky relative to the star, or, 19.6 arcsec/hr.
Position angle of asteroid motion is 87.6 degrees
The recommended exposure time corresponds to 8.2 km per image.
The 1-sigma error in the time of the event is 0.3 seconds.
The 1-sigma cross-track error in the shadow position is 43.2 km.
The sky-plane scale is 3004.5 km/arcsec.
Diameter estimates:
98.6 km assuming a 5% albedo, maximum of 6.0 sec for a central chord
40.3 km assuming a 30% albedo, maximum of 2.5 sec for a central chord
Cross-track diameter of 97.7 km used for deployment plan.
Star training set for 2207_Antenor, (2026/12/07 16:06UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.8 +07:24:35 0.4 8.11 145 Bellatrix 05:26:34.6 +06:22:19 1.6 10.62 150 131 Tau 05:48:45.2 +14:29:46 5.7 0.88 150 PPM 121403 05:49:12.6 +15:02:19 8.0 0.33 150 PPM 121391 05:48:40.7 +15:28:17 8.8 0.29 151 2207_Antenor 05:49:44.7 +15:20:45 13.6 150 Positions are for equinox of date
Star training set for 2207_Antenor, (2026/12/07 16:06UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 8.11 145 Bellatrix 05:25:07.8 +06:20:58 1.6 10.62 150 131 Tau 05:47:13.1 +14:29:18 5.7 0.88 150 PPM 121403 05:47:40.2 +15:01:52 8.0 0.33 150 PPM 121391 05:47:08.0 +15:27:48 8.8 0.29 151 2207_Antenor 05:48:12.0 +15:20:19 13.6 150 Positions are for J2000