Occultation event with (1749) Telamon, event index number 877
Regions able to see the event: NZ
Geocentric closest approach at 2025/04/02 09:56:56 UTC
J2000 position of star is 09:36:44.0 +15:33:33
Equinox of date position of star is 09:38:07.1 +15:26:42
Star is 73 degrees from the moon. Moon is 22% illuminated.
Stellar brightness G=14.4, apparent brightess of occulting body is G=14.4
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
Expected flux drop is 50% with SNR of 9.6 per integration
Apparent velocity is 5.4 km/sec on the sky relative to the star, or, 6.6 arcsec/hr.
The recommended exposure time corresponds to 2.7 km per image.
The 1-sigma error in the time of the event is 6.4 seconds.
The 1-sigma cross-track error in the shadow position is 25.5 km.
The sky-plane scale is 2969.1 km/arcsec.
Diameter estimates:
75.5 km assuming a 5% albedo, aximum of 13.9 sec for a central chord
30.8 km assuming a 30% albedo, maximum of 5.7 sec for a central chord
Cross-track diameter of 75.5 km used for deployment plan.
Star training set for 1749_Telamon, (2025/04/02 09:57UT) Object RA Dec mag sep mel Regulus 10:09:42.9 +11:50:34 1.3 8.48 82 16Psi Leo 09:45:06.2 +13:54:18 5.3 2.29 75 PPM 126635 09:39:01.8 +15:20:38 8.4 0.24 73 PPM 126630 09:38:31.8 +15:22:03 9.5 0.13 73 1749_Telamon 09:38:07.1 +15:26:42 14.4 73 Positions are for equinox of date
Star training set for 1749_Telamon, (2025/04/02 09:57UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 8.48 82 16Psi Leo 09:43:43.9 +14:01:18 5.3 2.29 75 PPM 126635 09:37:38.8 +15:27:30 8.4 0.24 73 PPM 126630 09:37:08.7 +15:28:55 9.5 0.13 73 1749_Telamon 09:36:44.0 +15:33:33 14.4 73 Positions are for J2000