Occultation event with (3708) Socus, event index number 4023
Regions able to see the event: SMexico
Geocentric closest approach at 2026/08/16 10:43:42 UTC
J2000 position of star is 05:52:04.2 +30:01:14
Equinox of date position of star is 05:53:46.7 +30:01:30
Star is 103 degrees from the moon. Moon is 16% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=15.0
Use an exposure time of 0.65 seconds with the standard RECON-QHY system.
SNR of 6.0 per integration for unocculted signal
Expected flux drop is 44% with SNR of 2.6 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 89.3 degrees
The recommended exposure time corresponds to 18.9 km per image.
The 1-sigma error in the time of the event is 0.2 seconds.
The 1-sigma cross-track error in the shadow position is 34.2 km.
The sky-plane scale is 4036.4 km/arcsec.
Diameter estimates:
83.2 km assuming a 5% albedo, maximum of 2.9 sec for a central chord
34.0 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 75.7 km used for deployment plan.
Star training set for 3708_Socus, (2026/08/16 10:44UT) Object RA Dec mag sep mel Aldebaran 04:37:27.1 +16:33:38 0.8 22.04 121 Alnath 05:27:58.6 +28:37:38 1.6 5.79 109 PPM 095117 05:58:15.3 +28:56:38 6.5 1.46 102 PPM 070931 05:53:26.7 +30:57:43 7.7 0.94 103 PPM 094994 05:53:53.2 +29:55:15 9.3 0.11 103 PPM 070944 05:54:00.7 +30:03:37 11.1 0.06 103 3708_Socus 05:53:46.7 +30:01:30 15.0 103 Positions are for equinox of date
Star training set for 3708_Socus, (2026/08/16 10:44UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 22.04 121 Alnath 05:26:17.6 +28:36:22 1.6 5.79 109 PPM 095117 05:56:33.8 +28:56:32 6.5 1.46 102 PPM 070931 05:51:43.5 +30:57:26 7.7 0.94 103 PPM 094994 05:52:10.8 +29:54:59 9.3 0.11 103 PPM 070944 05:52:18.3 +30:03:21 11.1 0.06 103 3708_Socus 05:52:04.2 +30:01:14 15.0 103 Positions are for J2000