Occultation event with (11397) 98XX93, event index number 3196
Regions able to see the event: Australia
Geocentric closest approach at 2026/02/01 17:05:57 UTC
J2000 position of star is 13:24:39.2 -29:56:48
Equinox of date position of star is 13:26:06.8 -30:04:55
Star is 82 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=15.6, apparent brightess of occulting body is G=16.0
Use an exposure time of 1.20 seconds with the standard RECON-QHY system.
SNR of 7.6 per integration for unocculted signal
Expected flux drop is 60% with SNR of 4.6 for the occulted depth (per occulted point)
Apparent velocity is 9.2 km/sec on the sky relative to the star, or, 8.7 arcsec/hr.
Position angle of asteroid motion is 162.8 degrees
The recommended exposure time corresponds to 11.0 km per image.
The 1-sigma error in the time of the event is 3.8 seconds.
The 1-sigma cross-track error in the shadow position is 4.7 km.
The sky-plane scale is 3819.7 km/arcsec.
Diameter estimates:
54.5 km assuming a 5% albedo, maximum of 5.9 sec for a central chord
22.2 km assuming a 30% albedo, maximum of 2.4 sec for a central chord
Cross-track diameter of 45.4 km used for deployment plan.
Star training set for 11397_98XX93, (2026/02/01 17:06UT) Object RA Dec mag sep mel Spica 13:26:34.3 -11:17:48 1.0 18.79 74 Iot Cen 13:22:04.4 -36:50:57 2.8 6.82 85 PPM 261770 13:34:03.5 -28:49:35 5.7 2.14 83 PPM 291435 13:30:26.5 -31:10:42 8.0 1.44 84 PPM 261648 13:27:34.3 -30:03:05 9.8 0.32 83 11397_98XX93 13:26:06.8 -30:04:55 16.0 83 Positions are for equinox of date
Star training set for 11397_98XX93, (2026/02/01 17:06UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 18.79 74 Iot Cen 13:20:35.1 -36:42:46 2.8 6.82 85 PPM 261770 13:32:35.7 -28:41:35 5.7 2.14 83 PPM 291435 13:28:58.2 -31:02:39 8.0 1.44 84 PPM 261648 13:26:06.6 -29:54:59 9.8 0.32 83 11397_98XX93 13:24:39.2 -29:56:48 16.0 82 Positions are for J2000