Occultation event with (11397) 98XX93, event index number 3613
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/04/11 17:18:24 UTC
J2000 position of star is 13:03:55.5 -29:56:29
Equinox of date position of star is 13:05:22.0 -30:04:55
Star is 101 degrees from the moon. Moon is 35% illuminated.
Stellar brightness G=14.2, apparent brightess of occulting body is G=15.4
Use an exposure time of 0.35 seconds with the standard RECON-QHY system.
SNR of 9.4 per integration for unocculted signal
Expected flux drop is 75% with SNR of 7.1 for the occulted depth (per occulted point)
Apparent velocity is 17.6 km/sec on the sky relative to the star, or, 18.9 arcsec/hr.
Position angle of asteroid motion is 118.9 degrees
The recommended exposure time corresponds to 6.2 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 26.8 km.
The sky-plane scale is 3345.0 km/arcsec.
Diameter estimates:
54.5 km assuming a 5% albedo, maximum of 3.1 sec for a central chord
22.2 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 45.4 km used for deployment plan.
Star training set for 11397_98XX93, (2026/04/11 17:18UT) Object RA Dec mag sep mel Spica 13:26:34.9 -11:17:51 1.0 19.42 105 Iot Cen 13:22:05.0 -36:51:00 2.8 7.61 94 PPM 291197 13:18:21.2 -31:38:40 5.1 3.19 97 PPM 261151 13:04:48.3 -29:48:14 7.8 0.30 101 PPM 261152 13:04:53.8 -29:59:58 8.6 0.13 101 11397_98XX93 13:05:22.0 -30:04:55 15.4 100 Positions are for equinox of date
Star training set for 11397_98XX93, (2026/04/11 17:18UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 19.42 105 Iot Cen 13:20:35.1 -36:42:46 2.8 7.61 94 PPM 291197 13:16:53.2 -31:30:24 5.1 3.19 97 PPM 261151 13:03:22.0 -29:39:48 7.8 0.30 101 PPM 261152 13:03:27.4 -29:51:32 8.6 0.13 101 11397_98XX93 13:03:55.5 -29:56:29 15.4 101 Positions are for J2000