Occultation event with (11397) 98XX93, event index number 3433
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2026/03/15 05:23:13 UTC
J2000 position of star is 13:17:10.9 -30:57:58
Equinox of date position of star is 13:18:38.5 -31:06:13
Star is 96 degrees from the moon. Moon is 16% illuminated.
Stellar brightness G=16.0, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 4.3 per integration for unocculted signal
Expected flux drop is 43% with SNR of 1.9 for the occulted depth (per occulted point)
Apparent velocity is 12.7 km/sec on the sky relative to the star, or, 13.3 arcsec/hr.
Position angle of asteroid motion is 97.5 degrees
The recommended exposure time corresponds to 10.8 km per image.
The 1-sigma error in the time of the event is 0.9 seconds.
The 1-sigma cross-track error in the shadow position is 34.0 km.
The sky-plane scale is 3448.8 km/arcsec.
Diameter estimates:
54.5 km assuming a 5% albedo, maximum of 4.3 sec for a central chord
22.2 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 45.4 km used for deployment plan.
Star training set for 11397_98XX93, (2026/03/15 05:23UT) Object RA Dec mag sep mel Spica 13:26:34.6 -11:17:50 1.0 19.89 103 Iot Cen 13:22:04.8 -36:50:59 2.8 5.79 93 PPM 291197 13:18:20.9 -31:38:39 5.1 0.54 96 PPM 291226 13:19:32.9 -30:52:11 8.4 0.30 96 PPM 291221 13:19:14.5 -31:00:45 9.2 0.16 96 11397_98XX93 13:18:38.5 -31:06:13 15.6 96 Positions are for equinox of date
Star training set for 11397_98XX93, (2026/03/15 05:23UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 19.89 103 Iot Cen 13:20:35.1 -36:42:46 2.8 5.79 93 PPM 291197 13:16:53.2 -31:30:24 5.1 0.54 96 PPM 291226 13:18:05.3 -30:43:57 8.4 0.30 96 PPM 291221 13:17:46.9 -30:52:31 9.2 0.16 96 11397_98XX93 13:17:10.9 -30:57:58 15.6 96 Positions are for J2000