Occultation event with (3708) Socus, event index number 4866
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/11/25 00:31:19 UTC
J2000 position of star is 06:12:28.8 +30:03:19
Equinox of date position of star is 06:14:12.3 +30:02:47
Star is 24 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=12.7, apparent brightess of occulting body is G=14.3
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 13.1 per integration for unocculted signal
Expected flux drop is 82% with SNR of 10.7 for the occulted depth (per occulted point)
Apparent velocity is 13.8 km/sec on the sky relative to the star, or, 16.0 arcsec/hr.
Position angle of asteroid motion is 86.3 degrees
The recommended exposure time corresponds to 1.7 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 33.8 km.
The sky-plane scale is 3123.8 km/arcsec.
Diameter estimates:
83.2 km assuming a 5% albedo, maximum of 6.0 sec for a central chord
34.0 km assuming a 30% albedo, maximum of 2.5 sec for a central chord
Cross-track diameter of 75.7 km used for deployment plan.
Star training set for 3708_Socus, (2026/11/25 00:31UT) Object RA Dec mag sep mel Pollux 07:46:57.5 +27:57:32 1.1 20.35 45 Alnath 05:27:59.7 +28:37:39 1.6 10.17 14 44Kap Aur 06:17:05.5 +29:29:08 4.3 0.84 25 PPM 095587 06:13:31.1 +29:40:20 8.3 0.40 24 PPM 071345 06:14:12.5 +30:18:26 9.9 0.26 24 PPM 095592 06:13:45.6 +29:55:10 11.4 0.16 24 3708_Socus 06:14:12.3 +30:02:47 14.3 25 Positions are for equinox of date
Star training set for 3708_Socus, (2026/11/25 00:31UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 20.35 45 Alnath 05:26:17.6 +28:36:22 1.6 10.17 14 44Kap Aur 06:15:22.5 +29:29:46 4.3 0.84 25 PPM 095587 06:11:47.9 +29:40:50 8.3 0.40 24 PPM 071345 06:12:28.8 +30:18:58 9.9 0.26 24 PPM 095592 06:12:02.2 +29:55:41 11.4 0.16 24 3708_Socus 06:12:28.8 +30:03:19 14.3 24 Positions are for J2000