Occultation event with (11396) 98XZ77, event index number 791
Regions able to see the event: Australia
Geocentric closest approach at 2025/03/10 17:10:59 UTC
J2000 position of star is 09:23:04.5 +03:22:31
Equinox of date position of star is 09:24:23.2 +03:15:59
Star is 20 degrees from the moon. Moon is 88% illuminated.
Stellar brightness G=11.9, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
Expected flux drop is 2% with SNR of 22.6 per integration
Apparent velocity is 14.9 km/sec on the sky relative to the star, or, 16.3 arcsec/hr.
The recommended exposure time corresponds to 1.8 km per image.
The 1-sigma error in the time of the event is 2.9 seconds.
The 1-sigma cross-track error in the shadow position is 29.3 km.
The sky-plane scale is 3298.1 km/arcsec.
Diameter estimates:
44.1 km assuming a 5% albedo, aximum of 3.0 sec for a central chord
18.0 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 44.1 km used for deployment plan.
Star training set for 11396_98XZ77, (2025/03/10 17:11UT) Object RA Dec mag sep mel Regulus 10:09:42.7 +11:50:35 1.3 14.12 20 Alphard 09:28:49.5 -08:46:08 2.0 12.09 31 22The Hya 09:15:40.4 +02:12:24 3.9 2.42 20 PPM 155768 09:24:34.4 +03:23:33 7.7 0.13 20 PPM 155759 09:24:14.9 +03:15:54 8.9 0.03 20 11396_98XZ77 09:24:23.2 +03:15:59 15.9 20 Positions are for equinox of date
Star training set for 11396_98XZ77, (2025/03/10 17:11UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 14.12 20 Alphard 09:27:35.2 -08:39:30 2.0 12.09 31 22The Hya 09:14:22.1 +02:18:44 3.9 2.42 20 PPM 155768 09:23:15.7 +03:30:06 7.7 0.13 20 PPM 155759 09:22:56.2 +03:22:25 8.9 0.03 20 11396_98XZ77 09:23:04.5 +03:22:31 15.9 20 Positions are for J2000