Occultation event with (11397) 98XX93, event index number 3326
Regions able to see the event: SAmericaS,NZ
Geocentric closest approach at 2026/02/28 09:44:53 UTC
J2000 position of star is 13:22:11.1 -30:55:48
Equinox of date position of star is 13:23:39.0 -31:03:59
Star is 91 degrees from the moon. Moon is 89% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=15.8
Use an exposure time of 1.30 seconds with the standard RECON-QHY system.
SNR of 4.3 per integration for unocculted signal
Expected flux drop is 39% with SNR of 1.7 for the occulted depth (per occulted point)
Apparent velocity is 8.6 km/sec on the sky relative to the star, or, 8.7 arcsec/hr.
Position angle of asteroid motion is 74.0 degrees
The recommended exposure time corresponds to 11.1 km per image.
The 1-sigma error in the time of the event is 0.4 seconds.
The 1-sigma cross-track error in the shadow position is 35.6 km.
The sky-plane scale is 3559.2 km/arcsec.
Diameter estimates:
54.5 km assuming a 5% albedo, maximum of 6.4 sec for a central chord
22.2 km assuming a 30% albedo, maximum of 2.6 sec for a central chord
Cross-track diameter of 45.4 km used for deployment plan.
Star training set for 11397_98XX93, (2026/02/28 09:45UT) Object RA Dec mag sep mel Spica 13:26:34.5 -11:17:49 1.0 19.78 83 Iot Cen 13:22:04.6 -36:50:58 2.8 5.79 93 PPM 291197 13:18:20.8 -31:38:38 5.1 1.27 90 PPM 291248 13:20:44.0 -31:01:25 8.3 0.63 91 PPM 291306 13:23:55.3 -30:56:36 8.8 0.14 91 11397_98XX93 13:23:39.0 -31:03:59 15.8 92 Positions are for equinox of date
Star training set for 11397_98XX93, (2026/02/28 09:45UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 19.78 83 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 1.27 90 PPM 291248 13:19:16.4 -30:53:12 8.3 0.63 91 PPM 291306 13:22:27.4 -30:48:26 8.8 0.14 91 11397_98XX93 13:22:11.1 -30:55:48 15.8 91 Positions are for J2000