Occultation event with (3708) Socus, event index number 1096
Regions able to see the event: SAfrica
Geocentric closest approach at 2025/06/26 03:33:28 UTC
J2000 position of star is 02:47:58.4 +27:56:24
Equinox of date position of star is 02:49:28.9 +28:02:42
Star is 56 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 19% with SNR of 0.6 for the occulted depth (per occulted point)
Apparent velocity is 34.4 km/sec on the sky relative to the star, or, 32.7 arcsec/hr.
The recommended exposure time corresponds to 29.3 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 16.4 km.
The sky-plane scale is 3784.8 km/arcsec.
Diameter estimates:
83.2 km assuming a 5% albedo, aximum of 2.4 sec for a central chord
34.0 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 83.2 km used for deployment plan.
Star training set for 3708_Socus, (2025/06/26 03:33UT) Object RA Dec mag sep mel Aldebaran 04:37:23.2 +16:33:30 0.8 27.39 36 Hamal 02:08:37.0 +23:34:54 2.0 10.22 66 35 Ari 02:44:57.3 +27:48:51 4.7 1.03 57 PPM 091941 02:46:00.4 +28:07:16 7.9 0.77 57 PPM 091971 02:48:42.6 +28:03:22 9.7 0.17 56 3708_Socus 02:49:28.9 +28:02:42 14.6 56 Positions are for equinox of date
Star training set for 3708_Socus, (2025/06/26 03:33UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 27.39 36 Hamal 02:07:10.8 +23:27:41 2.0 10.22 66 35 Ari 02:43:27.1 +27:42:25 4.7 1.03 57 PPM 091941 02:44:30.0 +28:00:52 7.9 0.77 57 PPM 091971 02:47:12.1 +27:57:02 9.7 0.17 56 3708_Socus 02:47:58.4 +27:56:24 14.6 56 Positions are for J2000