Occultation event with (3708) Socus, event index number 1474
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/11/08 07:52:09 UTC
J2000 position of star is 03:11:37.5 +32:49:22
Equinox of date position of star is 03:13:13.6 +32:55:08
Star is 32 degrees from the moon. Moon is 89% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=13.7
Use an exposure time of 1.15 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 9% with SNR of 0.3 for the occulted depth (per occulted point)
Apparent velocity is 15.8 km/sec on the sky relative to the star, or, 20.8 arcsec/hr.
Position angle of asteroid motion is 70.8 degrees
The recommended exposure time corresponds to 18.1 km per image.
The 1-sigma error in the time of the event is 1.0 seconds.
The 1-sigma cross-track error in the shadow position is 31.5 km.
The sky-plane scale is 2735.4 km/arcsec.
Diameter estimates:
83.2 km assuming a 5% albedo, aximum of 5.3 sec for a central chord
34.0 km assuming a 30% albedo, maximum of 2.2 sec for a central chord
Cross-track diameter of 75.7 km used for deployment plan.
Star training set for 3708_Socus, (2025/11/08 07:52UT) Object RA Dec mag sep mel Aldebaran 04:37:24.4 +16:33:33 0.8 25.06 19 Algol 03:09:51.7 +41:03:12 2.1 8.16 33 PPM 068330 03:20:21.4 +34:18:56 5.9 2.04 31 PPM 068267 03:17:23.5 +32:57:04 6.6 0.87 31 PPM 068183 03:12:58.0 +32:57:34 10.0 0.07 32 3708_Socus 03:13:13.6 +32:55:08 13.7 32 Positions are for equinox of date
Star training set for 3708_Socus, (2025/11/08 07:52UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 25.06 19 Algol 03:08:10.1 +40:57:20 2.1 8.16 33 PPM 068330 03:18:43.9 +34:13:22 5.9 2.04 31 PPM 068267 03:15:47.1 +32:51:25 6.6 0.87 31 PPM 068183 03:11:21.9 +32:51:47 10.0 0.07 32 3708_Socus 03:11:37.5 +32:49:22 13.7 32 Positions are for J2000