Occultation event with (6545) Leitus, event index number 3690
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/04/27 23:04:18 UTC
J2000 position of star is 12:43:15.3 -20:04:15
Equinox of date position of star is 12:44:38.7 -20:12:53
Star is 26 degrees from the moon. Moon is 87% illuminated.
Stellar brightness G=12.9, 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 11.5 per integration for unocculted signal
Expected flux drop is 90% with SNR of 10.3 for the occulted depth (per occulted point)
Apparent velocity is 15.6 km/sec on the sky relative to the star, or, 17.6 arcsec/hr.
Position angle of asteroid motion is 123.9 degrees
The recommended exposure time corresponds to 1.9 km per image.
The 1-sigma error in the time of the event is 1.9 seconds.
The 1-sigma cross-track error in the shadow position is 19.8 km.
The sky-plane scale is 3200.1 km/arcsec.
Diameter estimates:
55.0 km assuming a 5% albedo, maximum of 3.5 sec for a central chord
22.4 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 51.0 km used for deployment plan.
Star training set for 6545_Leitus, (2026/04/27 23:04UT) Object RA Dec mag sep mel Spica 13:26:35.0 -11:17:52 1.0 13.46 29 9Bet Crv 12:35:46.5 -23:32:31 2.6 3.91 28 PPM 226209 12:43:12.3 -19:54:11 6.1 0.46 26 PPM 226283 12:45:54.4 -20:06:17 9.1 0.32 26 6545_Leitus 12:44:38.7 -20:12:53 15.3 26 Positions are for equinox of date
Star training set for 6545_Leitus, (2026/04/27 23:04UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 13.46 29 9Bet Crv 12:34:23.2 -23:23:50 2.6 3.91 28 PPM 226209 12:41:49.1 -19:45:32 6.1 0.46 26 PPM 226283 12:44:30.9 -19:57:39 9.1 0.32 26 6545_Leitus 12:43:15.3 -20:04:15 15.3 26 Positions are for J2000