Occultation event with (11396) 98XZ77, event index number 3412
Regions able to see the event: Australia
Geocentric closest approach at 2026/03/12 18:34:26 UTC
J2000 position of star is 11:31:55.1 -03:08:25
Equinox of date position of star is 11:33:15.4 -03:17:06
Star is 102 degrees from the moon. Moon is 37% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.65 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 38% with SNR of 1.2 for the occulted depth (per occulted point)
Apparent velocity is 18.0 km/sec on the sky relative to the star, or, 19.7 arcsec/hr.
Position angle of asteroid motion is 120.7 degrees
The recommended exposure time corresponds to 11.7 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 28.9 km.
The sky-plane scale is 3292.2 km/arcsec.
Diameter estimates:
44.9 km assuming a 5% albedo, maximum of 2.5 sec for a central chord
18.3 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 37.1 km used for deployment plan.
Star training set for 11396_98XZ77, (2026/03/12 18:34UT) Object RA Dec mag sep mel Regulus 10:09:45.9 +11:50:17 1.3 25.68 127 4Gam Crv 12:17:09.4 -17:41:14 2.6 17.98 85 87 Leo 11:31:39.2 -03:08:54 4.8 0.42 102 PPM 178534 11:36:07.7 -02:38:09 8.4 0.97 102 PPM 178515 11:32:22.9 -03:06:00 9.4 0.29 102 11396_98XZ77 11:33:15.4 -03:17:06 15.6 101 Positions are for equinox of date
Star training set for 11396_98XZ77, (2026/03/12 18:34UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 25.68 127 4Gam Crv 12:15:48.1 -17:32:30 2.6 17.98 85 87 Leo 11:30:18.9 -03:00:13 4.8 0.42 102 PPM 178534 11:34:47.3 -02:29:27 8.4 0.97 102 PPM 178515 11:31:02.6 -02:57:19 9.4 0.29 102 11396_98XZ77 11:31:55.1 -03:08:25 15.6 102 Positions are for J2000