Occultation event with (3391) Sinon, event index number 3835
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/07/08 07:19:16 UTC
J2000 position of star is 11:13:08.8 +00:16:18
Equinox of date position of star is 11:14:30.3 +00:07:37
Star is 147 degrees from the moon. Moon is 45% illuminated.
Stellar brightness G=13.4, apparent brightess of occulting body is G=16.2
Use an exposure time of 0.14 seconds with the standard RECON-QHY system.
SNR of 9.5 per integration for unocculted signal
Expected flux drop is 93% with SNR of 8.8 for the occulted depth (per occulted point)
Apparent velocity is 25.7 km/sec on the sky relative to the star, or, 22.5 arcsec/hr.
Position angle of asteroid motion is 116.0 degrees
The recommended exposure time corresponds to 3.6 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 17.8 km.
The sky-plane scale is 4103.8 km/arcsec.
Diameter estimates:
51.5 km assuming a 5% albedo, maximum of 2.0 sec for a central chord
21.0 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 37.9 km used for deployment plan.
Star training set for 3391_Sinon, (2026/07/08 07:19UT) Object RA Dec mag sep mel Regulus 10:09:46.9 +11:50:12 1.3 19.88 127 Denebola 11:50:24.7 +14:25:26 2.1 16.83 145 69 Leo 11:15:07.0 -00:12:51 5.3 0.37 147 PPM 157622 11:14:06.6 +00:12:11 8.5 0.12 147 PPM 157626 11:14:13.1 +00:04:34 8.8 0.09 147 3391_Sinon 11:14:30.3 +00:07:37 16.2 147 Positions are for equinox of date
Star training set for 3391_Sinon, (2026/07/08 07:19UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 19.88 127 Denebola 11:49:02.7 +14:34:16 2.1 16.83 145 69 Leo 11:13:45.5 -00:04:10 5.3 0.37 147 PPM 157622 11:12:45.0 +00:20:52 8.5 0.12 147 PPM 157626 11:12:51.5 +00:13:15 8.8 0.09 147 3391_Sinon 11:13:08.8 +00:16:18 16.2 147 Positions are for J2000