Occultation event with (3391) Sinon, event index number 779
Regions able to see the event: Europe
Geocentric closest approach at 2025/03/08 18:34:08 UTC
J2000 position of star is 09:05:41.6 +23:53:52
Equinox of date position of star is 09:07:09.2 +23:47:45
Star is 27 degrees from the moon. Moon is 72% illuminated.
Stellar brightness G=12.8, apparent brightess of occulting body is G=15.3
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
Expected flux drop is 10% with SNR of 12.2 per integration
Apparent velocity is 12.3 km/sec on the sky relative to the star, or, 14.6 arcsec/hr.
The recommended exposure time corresponds to 1.5 km per image.
The 1-sigma error in the time of the event is 3.3 seconds.
The 1-sigma cross-track error in the shadow position is 22.7 km.
The sky-plane scale is 3023.7 km/arcsec.
Diameter estimates:
51.0 km assuming a 5% albedo, aximum of 4.2 sec for a central chord
20.8 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 51.0 km used for deployment plan.
Star training set for 3391_Sinon, (2025/03/08 18:34UT) Object RA Dec mag sep mel Pollux 07:46:51.2 +27:57:48 1.1 18.51 9 69Nu Cnc 09:04:12.3 +24:21:08 5.4 0.87 26 PPM 099316 09:08:30.0 +23:13:26 8.5 0.65 28 PPM 099304 09:07:32.0 +23:38:20 8.8 0.18 27 3391_Sinon 09:07:09.2 +23:47:45 15.3 28 Positions are for equinox of date
Star training set for 3391_Sinon, (2025/03/08 18:34UT) Object RA Dec mag sep mel Pollux 07:45:17.8 +28:01:33 1.1 18.51 9 69Nu Cnc 09:02:44.2 +24:27:10 5.4 0.87 26 PPM 099316 09:07:02.7 +23:19:35 8.5 0.65 28 PPM 099304 09:06:04.5 +23:44:27 8.8 0.18 27 3391_Sinon 09:05:41.6 +23:53:52 15.3 27 Positions are for J2000