Occultation event with (2797) Teucer, event index number 1073
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/06/18 23:01:25 UTC
J2000 position of star is 10:59:52.5 +29:12:56
Equinox of date position of star is 11:01:15.7 +29:04:42
Star is 147 degrees from the moon. Moon is 48% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=14.2
Use an exposure time of 0.95 seconds with the standard RECON-QHY system.
SNR of 6.8 per integration for unocculted signal
Expected flux drop is 28% with SNR of 1.9 for the occulted depth (per occulted point)
Apparent velocity is 26.9 km/sec on the sky relative to the star, or, 26.4 arcsec/hr.
The recommended exposure time corresponds to 25.6 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 32.3 km.
The sky-plane scale is 3670.5 km/arcsec.
Diameter estimates:
103.8 km assuming a 5% albedo, aximum of 3.9 sec for a central chord
42.4 km assuming a 30% albedo, maximum of 1.6 sec for a central chord
Cross-track diameter of 103.8 km used for deployment plan.
Star training set for 2797_Teucer, (2025/06/18 23:01UT) Object RA Dec mag sep mel Regulus 10:09:43.5 +11:50:30 1.3 21.00 150 68Del Leo 11:15:27.5 +20:23:02 2.6 9.27 156 44 LMi 10:51:17.4 +27:50:20 6.0 2.52 147 PPM 100830 11:03:12.3 +29:44:02 8.2 0.78 147 PPM 100817 11:02:11.7 +29:04:53 8.6 0.20 147 2797_Teucer 11:01:15.7 +29:04:42 14.2 147 Positions are for equinox of date
Star training set for 2797_Teucer, (2025/06/18 23:01UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 21.00 150 68Del Leo 11:14:06.7 +20:31:22 2.6 9.27 156 44 LMi 10:49:53.7 +27:58:27 6.0 2.52 147 PPM 100830 11:01:49.1 +29:52:16 8.2 0.78 147 PPM 100817 11:00:48.7 +29:13:07 8.6 0.20 147 2797_Teucer 10:59:52.5 +29:12:56 14.2 147 Positions are for J2000