Occultation event with (3708) Socus, event index number 3979
Regions able to see the event: SMexico
Geocentric closest approach at 2026/08/10 10:50:52 UTC
J2000 position of star is 05:47:08.8 +30:00:16
Equinox of date position of star is 05:48:51.2 +30:00:44
Star is 20 degrees from the moon. Moon is 7% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=15.0
Use an exposure time of 0.60 seconds with the standard RECON-QHY system.
SNR of 4.0 per integration for unocculted signal
Expected flux drop is 34% with SNR of 1.4 for the occulted depth (per occulted point)
Apparent velocity is 31.1 km/sec on the sky relative to the star, or, 27.4 arcsec/hr.
Position angle of asteroid motion is 89.0 degrees
The recommended exposure time corresponds to 18.6 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 35.0 km.
The sky-plane scale is 4084.6 km/arcsec.
Diameter estimates:
83.2 km assuming a 5% albedo, maximum of 2.7 sec for a central chord
34.0 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 75.7 km used for deployment plan.
Star training set for 3708_Socus, (2026/08/10 10:51UT) Object RA Dec mag sep mel Aldebaran 04:37:27.0 +16:33:38 0.8 21.15 38 Alnath 05:27:58.6 +28:37:38 1.6 4.76 24 PPM 094619 05:40:59.9 +29:13:41 5.9 1.88 21 PPM 094872 05:49:06.9 +29:39:50 8.1 0.35 19 PPM 094858 05:48:39.0 +29:49:20 9.6 0.20 20 3708_Socus 05:48:51.2 +30:00:44 15.0 19 Positions are for equinox of date
Star training set for 3708_Socus, (2026/08/10 10:51UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 21.15 38 Alnath 05:26:17.6 +28:36:22 1.6 4.76 24 PPM 094619 05:39:18.3 +29:12:54 5.9 1.88 21 PPM 094872 05:47:24.9 +29:39:23 8.1 0.35 19 PPM 094858 05:46:56.8 +29:48:51 9.6 0.20 20 3708_Socus 05:47:08.8 +30:00:16 15.0 20 Positions are for J2000