Occultation event with (3708) Socus, event index number 3324
Regions able to see the event: Europe
Geocentric closest approach at 2026/02/27 21:41:13 UTC
J2000 position of star is 03:07:25.2 +27:31:25
Equinox of date position of star is 03:08:59.0 +27:37:22
Star is 62 degrees from the moon. Moon is 85% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=14.8
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 3.7 per integration for unocculted signal
Expected flux drop is 25% with SNR of 0.9 for the occulted depth (per occulted point)
Apparent velocity is 23.1 km/sec on the sky relative to the star, or, 22.8 arcsec/hr.
Position angle of asteroid motion is 90.3 degrees
The recommended exposure time corresponds to 18.5 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 34.7 km.
The sky-plane scale is 3658.5 km/arcsec.
Diameter estimates:
83.2 km assuming a 5% albedo, maximum of 3.6 sec for a central chord
34.0 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 75.7 km used for deployment plan.
Star training set for 3708_Socus, (2026/02/27 21:41UT) Object RA Dec mag sep mel Aldebaran 04:37:25.5 +16:33:35 0.8 23.23 45 44Zet Per 03:55:47.0 +31:57:33 2.8 11.03 51 PPM 092256 03:11:42.9 +27:55:02 6.4 0.67 61 PPM 092201 03:07:09.1 +27:58:11 8.5 0.53 62 PPM 092204 03:07:21.9 +27:47:10 8.8 0.39 62 PPM 092238 03:10:26.8 +27:28:39 11.3 0.36 61 3708_Socus 03:08:59.0 +27:37:22 14.8 61 Positions are for equinox of date
Star training set for 3708_Socus, (2026/02/27 21:41UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 23.23 45 44Zet Per 03:54:07.9 +31:53:01 2.8 11.03 51 PPM 092256 03:10:08.8 +27:49:09 6.4 0.67 61 PPM 092201 03:05:35.2 +27:52:10 8.5 0.53 62 PPM 092204 03:05:48.1 +27:41:10 8.8 0.39 62 PPM 092238 03:08:53.0 +27:22:44 11.3 0.36 61 3708_Socus 03:07:25.2 +27:31:25 14.8 62 Positions are for J2000