Occultation event with (11397) 98XX93, event index number 3808
Regions able to see the event: Australia
Geocentric closest approach at 2026/06/27 08:25:32 UTC
J2000 position of star is 12:48:27.7 -24:11:19
Equinox of date position of star is 12:49:52.5 -24:19:57
Star is 47 degrees from the moon. Moon is 94% illuminated.
Stellar brightness G=16.9, apparent brightess of occulting body is G=16.0
Use an exposure time of 1.75 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 30% with SNR of 0.9 for the occulted depth (per occulted point)
Apparent velocity is 11.4 km/sec on the sky relative to the star, or, 10.8 arcsec/hr.
Position angle of asteroid motion is 45.0 degrees
The recommended exposure time corresponds to 19.9 km per image.
The 1-sigma error in the time of the event is 1.6 seconds.
The 1-sigma cross-track error in the shadow position is 30.2 km.
The sky-plane scale is 3790.3 km/arcsec.
Diameter estimates:
54.5 km assuming a 5% albedo, maximum of 4.8 sec for a central chord
22.2 km assuming a 30% albedo, maximum of 2.0 sec for a central chord
Cross-track diameter of 45.4 km used for deployment plan.
Star training set for 11397_98XX93, (2026/06/27 08:26UT) Object RA Dec mag sep mel Spica 13:26:35.5 -11:17:55 1.0 15.68 43 9Bet Crv 12:35:47.0 -23:32:34 2.6 3.32 50 PPM 260710 12:44:37.7 -25:08:07 6.5 1.44 48 PPM 260768 12:47:06.8 -24:40:49 8.4 0.72 47 PPM 260844 12:50:58.3 -24:27:27 9.4 0.28 46 11397_98XX93 12:49:52.5 -24:19:57 16.0 46 Positions are for equinox of date
Star training set for 11397_98XX93, (2026/06/27 08:26UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 15.68 43 9Bet Crv 12:34:23.2 -23:23:50 2.6 3.32 50 PPM 260710 12:43:13.1 -24:59:26 6.5 1.44 48 PPM 260768 12:45:42.1 -24:32:09 8.4 0.72 47 PPM 260844 12:49:33.4 -24:18:49 9.4 0.28 46 11397_98XX93 12:48:27.7 -24:11:19 16.0 47 Positions are for J2000