Occultation event with (11396) 98XZ77, event index number 3562
Regions able to see the event: Australia
Geocentric closest approach at 2026/04/01 11:29:02 UTC
J2000 position of star is 11:23:21.8 -01:46:46
Equinox of date position of star is 11:24:42.4 -01:55:25
Star is 13 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.55 seconds with the standard RECON-QHY system.
SNR of 4.9 per integration for unocculted signal
Expected flux drop is 58% with SNR of 2.8 for the occulted depth (per occulted point)
Apparent velocity is 16.6 km/sec on the sky relative to the star, or, 18.0 arcsec/hr.
Position angle of asteroid motion is 124.7 degrees
The recommended exposure time corresponds to 9.1 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 27.6 km.
The sky-plane scale is 3322.1 km/arcsec.
Diameter estimates:
44.9 km assuming a 5% albedo, maximum of 2.7 sec for a central chord
18.3 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 37.1 km used for deployment plan.
Star training set for 11396_98XZ77, (2026/04/01 11:29UT) Object RA Dec mag sep mel Regulus 10:09:46.0 +11:50:16 1.3 23.15 35 Denebola 11:50:23.8 +14:25:31 2.1 17.54 19 87 Leo 11:31:39.4 -03:08:55 4.8 2.12 11 PPM 178483 11:26:18.6 -02:21:26 7.3 0.59 12 PPM 178480 11:25:37.6 -01:40:28 9.3 0.34 12 PPM 178481 11:25:41.6 -02:02:35 10.7 0.27 12 11396_98XZ77 11:24:42.4 -01:55:25 15.8 12 Positions are for equinox of date
Star training set for 11396_98XZ77, (2026/04/01 11:29UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 23.15 35 Denebola 11:49:02.7 +14:34:16 2.1 17.54 19 87 Leo 11:30:18.9 -03:00:13 4.8 2.12 11 PPM 178483 11:24:58.1 -02:12:46 7.3 0.59 12 PPM 178480 11:24:17.1 -01:31:48 9.3 0.34 12 PPM 178481 11:24:21.1 -01:53:55 10.7 0.27 12 11396_98XZ77 11:23:21.8 -01:46:46 15.8 13 Positions are for J2000