Occultation event with (11396) 98XZ77, event index number 1485
Regions able to see the event: Australia
Geocentric closest approach at 2025/11/10 19:29:02 UTC
J2000 position of star is 11:28:09.7 -02:57:00
Equinox of date position of star is 11:29:29.0 -03:05:33
Star is 54 degrees from the moon. Moon is 65% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=16.6
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 3.2 per integration for unocculted signal
Expected flux drop is 66% with SNR of 2.1 for the occulted depth (per occulted point)
Apparent velocity is 29.1 km/sec on the sky relative to the star, or, 24.0 arcsec/hr.
Position angle of asteroid motion is 113.4 degrees
The recommended exposure time corresponds to 14.5 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 32.3 km.
The sky-plane scale is 4363.8 km/arcsec.
Diameter estimates:
44.9 km assuming a 5% albedo, aximum of 1.5 sec for a central chord
18.3 km assuming a 30% albedo, maximum of 0.6 sec for a central chord
Cross-track diameter of 37.1 km used for deployment plan.
Star training set for 11396_98XZ77, (2025/11/10 19:29UT) Object RA Dec mag sep mel Regulus 10:09:44.8 +11:50:23 1.3 24.81 29 Denebola 11:50:22.6 +14:25:39 2.1 18.27 51 87 Leo 11:31:38.2 -03:08:47 4.8 0.54 54 PPM 178483 11:26:17.4 -02:21:18 7.3 1.09 52 PPM 194511 11:29:50.8 -03:25:21 9.1 0.34 54 PPM 178503 11:30:24.7 -03:02:44 10.8 0.24 54 11396_98XZ77 11:29:29.0 -03:05:33 16.6 54 Positions are for equinox of date
Star training set for 11396_98XZ77, (2025/11/10 19:29UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 24.81 29 Denebola 11:49:02.7 +14:34:16 2.1 18.27 51 87 Leo 11:30:18.9 -03:00:13 4.8 0.54 54 PPM 178483 11:24:58.1 -02:12:46 7.3 1.09 52 PPM 194511 11:28:31.6 -03:16:47 9.1 0.34 54 PPM 178503 11:29:05.5 -02:54:10 10.8 0.24 54 11396_98XZ77 11:28:09.7 -02:57:00 16.6 54 Positions are for J2000