Occultation event with (3708) Socus, event index number 1147
Regions able to see the event: Australia
Geocentric closest approach at 2025/07/16 18:10:50 UTC
J2000 position of star is 03:05:30.1 +29:32:50
Equinox of date position of star is 03:07:02.8 +29:38:42
Star is 45 degrees from the moon. Moon is 64% illuminated.
Stellar brightness G=14.6, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.60 seconds with the standard RECON-QHY system.
SNR of 9.5 per integration for unocculted signal
Expected flux drop is 51% with SNR of 4.8 for the occulted depth (per occulted point)
Apparent velocity is 27.8 km/sec on the sky relative to the star, or, 27.6 arcsec/hr.
The recommended exposure time corresponds to 16.7 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 16.7 km.
The sky-plane scale is 3620.8 km/arcsec.
Diameter estimates:
83.2 km assuming a 5% albedo, aximum of 3.0 sec for a central chord
34.0 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 83.2 km used for deployment plan.
Star training set for 3708_Socus, (2025/07/16 18:11UT) Object RA Dec mag sep mel Aldebaran 04:37:23.4 +16:33:31 0.8 24.48 62 44Zet Per 03:55:44.6 +31:57:26 2.8 10.70 56 55 Ari 03:11:09.3 +29:10:22 5.7 1.01 46 PPM 092195 03:06:52.9 +29:38:16 8.2 0.04 45 3708_Socus 03:07:02.8 +29:38:42 14.6 45 Positions are for equinox of date
Star training set for 3708_Socus, (2025/07/16 18:11UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 24.48 62 44Zet Per 03:54:07.9 +31:53:01 2.8 10.70 56 55 Ari 03:09:36.8 +29:04:37 5.7 1.01 46 PPM 092195 03:05:20.3 +29:32:24 8.2 0.04 45 3708_Socus 03:05:30.1 +29:32:50 14.6 45 Positions are for J2000