Occultation event with (6545) Leitus, event index number 1087
Regions able to see the event: US
Geocentric closest approach at 2025/06/23 02:07:28 UTC
J2000 position of star is 10:48:54.6 -04:43:18
Equinox of date position of star is 10:50:12.1 -04:51:25
Star is 107 degrees from the moon. Moon is 8% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.65 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 46% with SNR of 1.4 for the occulted depth (per occulted point)
Apparent velocity is 21.3 km/sec on the sky relative to the star, or, 19.4 arcsec/hr.
The recommended exposure time corresponds to 13.8 km per image.
The 1-sigma error in the time of the event is 2.3 seconds.
The 1-sigma cross-track error in the shadow position is 26.0 km.
The sky-plane scale is 3936.4 km/arcsec.
Diameter estimates:
54.7 km assuming a 5% albedo, aximum of 2.6 sec for a central chord
22.3 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 54.7 km used for deployment plan.
Star training set for 6545_Leitus, (2025/06/23 02:07UT) Object RA Dec mag sep mel Regulus 10:09:43.6 +11:50:30 1.3 19.50 90 PPM 193861 10:52:23.1 -03:13:42 5.8 1.72 106 PPM 193866 10:52:36.0 -04:52:20 7.3 0.60 107 PPM 193804 10:49:56.1 -04:49:31 9.5 0.07 106 6545_Leitus 10:50:12.1 -04:51:25 16.0 107 Positions are for equinox of date
Star training set for 6545_Leitus, (2025/06/23 02:07UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 19.50 90 PPM 193861 10:51:05.3 -03:05:34 5.8 1.72 106 PPM 193866 10:51:18.5 -04:44:12 7.3 0.60 107 PPM 193804 10:48:38.6 -04:41:25 9.5 0.07 106 6545_Leitus 10:48:54.6 -04:43:18 16.0 107 Positions are for J2000