Occultation event with (6545) Leitus, event index number 3492
Regions able to see the event: Australia
Geocentric closest approach at 2026/03/23 12:50:53 UTC
J2000 position of star is 13:00:24.5 -21:56:28
Equinox of date position of star is 13:01:48.9 -22:04:55
Star is 139 degrees from the moon. Moon is 25% illuminated.
Stellar brightness G=12.8, apparent brightess of occulting body is G=15.3
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 12.7 per integration for unocculted signal
Expected flux drop is 91% with SNR of 11.5 for the occulted depth (per occulted point)
Apparent velocity is 15.5 km/sec on the sky relative to the star, or, 17.4 arcsec/hr.
Position angle of asteroid motion is 106.2 degrees
The recommended exposure time corresponds to 1.9 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 28.5 km.
The sky-plane scale is 3201.2 km/arcsec.
Diameter estimates:
55.0 km assuming a 5% albedo, maximum of 3.6 sec for a central chord
22.4 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 51.0 km used for deployment plan.
Star training set for 6545_Leitus, (2026/03/23 12:51UT) Object RA Dec mag sep mel Spica 13:26:34.7 -11:17:51 1.0 12.30 141 9Bet Crv 12:35:46.2 -23:32:29 2.6 6.18 134 PPM 261041 12:58:57.4 -22:53:42 6.0 1.05 139 PPM 261100 13:01:55.0 -21:55:49 8.4 0.15 139 6545_Leitus 13:01:48.9 -22:04:55 15.3 140 Positions are for equinox of date
Star training set for 6545_Leitus, (2026/03/23 12:51UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 12.30 141 9Bet Crv 12:34:23.2 -23:23:50 2.6 6.18 134 PPM 261041 12:57:33.0 -22:45:13 6.0 1.05 139 PPM 261100 13:00:30.6 -21:47:22 8.4 0.15 139 6545_Leitus 13:00:24.5 -21:56:28 15.3 139 Positions are for J2000