Occultation event with (11397) 98XX93, event index number 1522
Regions able to see the event: Australia
Geocentric closest approach at 2025/11/16 20:23:15 UTC
J2000 position of star is 12:48:19.1 -23:40:45
Equinox of date position of star is 12:49:41.9 -23:49:12
Star is 15 degrees from the moon. Moon is 10% illuminated.
Stellar brightness G=14.0, apparent brightess of occulting body is G=16.2
Use an exposure time of 0.25 seconds with the standard RECON-QHY system.
SNR of 9.3 per integration for unocculted signal
Expected flux drop is 89% with SNR of 8.3 for the occulted depth (per occulted point)
Apparent velocity is 37.0 km/sec on the sky relative to the star, or, 29.3 arcsec/hr.
Position angle of asteroid motion is 118.5 degrees
The recommended exposure time corresponds to 9.3 km per image.
The 1-sigma error in the time of the event is 0.6 seconds.
The 1-sigma cross-track error in the shadow position is 25.9 km.
The sky-plane scale is 4545.1 km/arcsec.
Diameter estimates:
54.5 km assuming a 5% albedo, aximum of 1.5 sec for a central chord
22.2 km assuming a 30% albedo, maximum of 0.6 sec for a central chord
Cross-track diameter of 45.4 km used for deployment plan.
Star training set for 11397_98XX93, (2025/11/16 20:23UT) Object RA Dec mag sep mel Spica 13:26:33.6 -11:17:44 1.0 15.29 6 9Bet Crv 12:35:45.1 -23:32:22 2.6 3.21 15 PPM 260710 12:44:35.8 -25:07:55 6.5 1.75 16 PPM 260829 12:50:24.5 -23:22:44 7.9 0.47 14 PPM 260818 12:49:59.5 -23:41:59 9.2 0.14 15 11397_98XX93 12:49:41.9 -23:49:12 16.2 15 Positions are for equinox of date
Star training set for 11397_98XX93, (2025/11/16 20:23UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 15.29 6 9Bet Crv 12:34:23.2 -23:23:50 2.6 3.21 15 PPM 260710 12:43:13.1 -24:59:26 6.5 1.75 16 PPM 260829 12:49:01.7 -23:14:18 7.9 0.47 14 PPM 260818 12:48:36.7 -23:33:32 9.2 0.14 15 11397_98XX93 12:48:19.1 -23:40:45 16.2 15 Positions are for J2000