Occultation event with (6545) Leitus, event index number 3873
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/07/21 01:00:43 UTC
J2000 position of star is 12:46:15.1 -16:59:49
Equinox of date position of star is 12:47:39.0 -17:08:30
Star is 9 degrees from the moon. Moon is 46% illuminated.
Stellar brightness G=15.3, 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 6.3 per integration for unocculted signal
Expected flux drop is 66% with SNR of 4.2 for the occulted depth (per occulted point)
Apparent velocity is 19.0 km/sec on the sky relative to the star, or, 17.2 arcsec/hr.
Position angle of asteroid motion is 95.0 degrees
The recommended exposure time corresponds to 12.3 km per image.
The 1-sigma error in the time of the event is 0.8 seconds.
The 1-sigma cross-track error in the shadow position is 31.6 km.
The sky-plane scale is 3961.2 km/arcsec.
Diameter estimates:
55.0 km assuming a 5% albedo, maximum of 2.9 sec for a central chord
22.4 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 51.0 km used for deployment plan.
Star training set for 6545_Leitus, (2026/07/21 01:01UT) Object RA Dec mag sep mel Spica 13:26:35.7 -11:17:57 1.0 11.10 2 9Bet Crv 12:35:47.2 -23:32:36 2.6 6.98 15 PPM 226138 12:40:08.1 -18:23:44 6.0 2.18 11 PPM 226401 12:50:51.0 -17:17:25 8.5 0.78 9 PPM 226312 12:47:27.0 -17:15:39 9.8 0.13 9 6545_Leitus 12:47:39.0 -17:08:30 16.0 9 Positions are for equinox of date
Star training set for 6545_Leitus, (2026/07/21 01:01UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 11.10 2 9Bet Crv 12:34:23.2 -23:23:50 2.6 6.98 15 PPM 226138 12:38:44.4 -18:15:00 6.0 2.18 11 PPM 226401 12:49:27.0 -17:08:45 8.5 0.78 9 PPM 226312 12:46:03.2 -17:06:58 9.8 0.13 9 6545_Leitus 12:46:15.1 -16:59:49 16.0 9 Positions are for J2000