Occultation event with (6545) Leitus, event index number 1687
Regions able to see the event: Europe
Geocentric closest approach at 2025/12/16 04:48:41 UTC
J2000 position of star is 12:58:38.7 -18:24:18
Equinox of date position of star is 13:00:01.5 -18:32:41
Star is 23 degrees from the moon. Moon is 13% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 5.8 per integration for unocculted signal
Expected flux drop is 70% with SNR of 4.1 for the occulted depth (per occulted point)
Apparent velocity is 26.3 km/sec on the sky relative to the star, or, 23.0 arcsec/hr.
Position angle of asteroid motion is 123.5 degrees
The recommended exposure time corresponds to 11.8 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 20.2 km.
The sky-plane scale is 4107.7 km/arcsec.
Diameter estimates:
55.0 km assuming a 5% albedo, aximum of 2.1 sec for a central chord
22.4 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 51.0 km used for deployment plan.
Star training set for 6545_Leitus, (2025/12/16 04:49UT) Object RA Dec mag sep mel Spica 13:26:33.9 -11:17:46 1.0 9.67 19 9Bet Crv 12:35:45.4 -23:32:24 2.6 7.55 28 PPM 261160 13:05:09.8 -20:43:20 5.5 2.49 21 PPM 226665 13:02:33.6 -18:15:42 7.5 0.66 22 PPM 226620 13:00:25.8 -18:31:57 9.7 0.10 22 6545_Leitus 13:00:01.5 -18:32:41 16.0 22 Positions are for equinox of date
Star training set for 6545_Leitus, (2025/12/16 04:49UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 9.67 19 9Bet Crv 12:34:23.2 -23:23:50 2.6 7.55 28 PPM 261160 13:03:46.4 -20:35:00 5.5 2.49 21 PPM 226665 13:01:10.7 -18:07:21 7.5 0.66 22 PPM 226620 12:59:03.0 -18:23:34 9.7 0.10 22 6545_Leitus 12:58:38.7 -18:24:18 16.0 23 Positions are for J2000