Occultation event with (11397) 98XX93, event index number 3377
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2026/03/08 06:30:34 UTC
J2000 position of star is 13:19:48.5 -31:00:00
Equinox of date position of star is 13:21:16.2 -31:08:13
Star is 20 degrees from the moon. Moon is 78% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=15.7
Use an exposure time of 1.05 seconds with the standard RECON-QHY system.
SNR of 3.3 per integration for unocculted signal
Expected flux drop is 35% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 10.7 km/sec on the sky relative to the star, or, 11.1 arcsec/hr.
Position angle of asteroid motion is 88.7 degrees
The recommended exposure time corresponds to 11.3 km per image.
The 1-sigma error in the time of the event is 0.5 seconds.
The 1-sigma cross-track error in the shadow position is 35.9 km.
The sky-plane scale is 3496.6 km/arcsec.
Diameter estimates:
54.5 km assuming a 5% albedo, maximum of 5.1 sec for a central chord
22.2 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 45.4 km used for deployment plan.
Star training set for 11397_98XX93, (2026/03/08 06:31UT) Object RA Dec mag sep mel Spica 13:26:34.6 -11:17:50 1.0 19.88 20 Iot Cen 13:22:04.7 -36:50:59 2.8 5.72 23 PPM 291197 13:18:20.9 -31:38:39 5.1 0.80 21 PPM 291248 13:20:44.0 -31:01:25 8.3 0.16 21 11397_98XX93 13:21:16.2 -31:08:13 15.7 20 Positions are for equinox of date
Star training set for 11397_98XX93, (2026/03/08 06:31UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 19.88 20 Iot Cen 13:20:35.1 -36:42:46 2.8 5.72 23 PPM 291197 13:16:53.2 -31:30:24 5.1 0.80 21 PPM 291248 13:19:16.4 -30:53:12 8.3 0.16 21 11397_98XX93 13:19:48.5 -31:00:00 15.7 20 Positions are for J2000