Occultation event with (2797) Teucer, event index number 1062
Regions able to see the event: Australia
Geocentric closest approach at 2025/06/15 11:03:58 UTC
J2000 position of star is 10:57:54.7 +29:38:36
Equinox of date position of star is 10:59:18.1 +29:30:24
Star is 153 degrees from the moon. Moon is 83% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=14.2
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
SNR of 6.9 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 25.7 km/sec on the sky relative to the star, or, 25.5 arcsec/hr.
Position angle of asteroid motion is 313.6 degrees
The recommended exposure time corresponds to 25.7 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 29.5 km.
The sky-plane scale is 3636.0 km/arcsec.
Diameter estimates:
103.8 km assuming a 5% albedo, aximum of 4.0 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, (2025/06/15 11:04UT) Object RA Dec mag sep mel Regulus 10:09:43.5 +11:50:31 1.3 21.09 163 68Del Leo 11:15:27.5 +20:23:02 2.6 9.83 150 44 LMi 10:51:17.4 +27:50:20 6.0 2.42 155 PPM 100748 10:55:58.8 +29:29:37 7.0 0.72 154 PPM 100817 11:02:11.7 +29:04:53 8.6 0.76 152 PPM 100781 10:58:59.5 +29:23:58 11.5 0.13 153 2797_Teucer 10:59:18.1 +29:30:24 14.2 153 Positions are for equinox of date
Star training set for 2797_Teucer, (2025/06/15 11:04UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 21.09 163 68Del Leo 11:14:06.7 +20:31:22 2.6 9.83 150 44 LMi 10:49:53.7 +27:58:27 6.0 2.42 155 PPM 100748 10:54:35.2 +29:37:47 7.0 0.72 154 PPM 100817 11:00:48.7 +29:13:07 8.6 0.76 152 PPM 100781 10:57:36.1 +29:32:10 11.5 0.13 153 2797_Teucer 10:57:54.7 +29:38:36 14.2 153 Positions are for J2000