Occultation event with (2797) Teucer, event index number 1032
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/06/06 00:11:27 UTC
J2000 position of star is 10:53:11.3 +30:46:34
Equinox of date position of star is 10:54:35.2 +30:38:25
Star is 50 degrees from the moon. Moon is 76% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=14.2
Use an exposure time of 1.15 seconds with the standard RECON-QHY system.
SNR of 5.0 per integration for unocculted signal
Expected flux drop is 19% with SNR of 1.0 for the occulted depth (per occulted point)
Apparent velocity is 22.5 km/sec on the sky relative to the star, or, 22.9 arcsec/hr.
Position angle of asteroid motion is 311.1 degrees
The recommended exposure time corresponds to 25.9 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 28.9 km.
The sky-plane scale is 3540.4 km/arcsec.
Diameter estimates:
103.8 km assuming a 5% albedo, aximum of 4.6 sec for a central chord
42.4 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 103.8 km used for deployment plan.
Star training set for 2797_Teucer, (2025/06/06 00:11UT) Object RA Dec mag sep mel Regulus 10:09:43.4 +11:50:31 1.3 21.48 47 68Del Leo 11:15:27.4 +20:23:02 2.6 11.28 39 46 UMa 10:57:08.5 +33:22:15 6.2 2.78 51 PPM 075578 10:58:59.3 +30:30:58 8.1 0.96 49 PPM 075530 10:54:12.1 +30:14:55 9.3 0.40 49 PPM 075544 10:55:44.4 +30:20:48 10.4 0.38 49 2797_Teucer 10:54:35.2 +30:38:25 14.2 49 Positions are for equinox of date
Star training set for 2797_Teucer, (2025/06/06 00:11UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 21.48 47 68Del Leo 11:14:06.7 +20:31:22 2.6 11.28 39 46 UMa 10:55:44.2 +33:30:25 6.2 2.78 51 PPM 075578 10:57:35.8 +30:39:09 8.1 0.96 49 PPM 075530 10:52:48.3 +30:23:03 9.3 0.40 49 PPM 075544 10:54:20.6 +30:28:58 10.4 0.38 49 2797_Teucer 10:53:11.3 +30:46:34 14.2 50 Positions are for J2000