Occultation event with (11397) 98XX93, event index number 3704
Regions able to see the event: SAmericaN,SMexico
Geocentric closest approach at 2026/05/01 01:11:26 UTC
J2000 position of star is 12:54:45.8 -28:31:53
Equinox of date position of star is 12:56:11.4 -28:40:25
Star is 19 degrees from the moon. Moon is 99% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.95 seconds with the standard RECON-QHY system.
SNR of 3.1 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 17.2 km/sec on the sky relative to the star, or, 18.4 arcsec/hr.
Position angle of asteroid motion is 131.9 degrees
The recommended exposure time corresponds to 16.4 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 20.3 km.
The sky-plane scale is 3363.5 km/arcsec.
Diameter estimates:
54.5 km assuming a 5% albedo, maximum of 3.2 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, (2026/05/01 01:11UT) Object RA Dec mag sep mel Spica 13:26:35.0 -11:17:52 1.0 18.77 10 9Bet Crv 12:35:46.5 -23:32:31 2.6 6.88 21 PPM 260814 12:49:50.9 -27:44:28 5.6 1.68 19 PPM 260955 12:55:41.6 -28:06:07 7.3 0.58 19 PPM 260988 12:56:40.6 -28:35:50 9.5 0.13 19 11397_98XX93 12:56:11.4 -28:40:25 15.5 19 Positions are for equinox of date
Star training set for 11397_98XX93, (2026/05/01 01:11UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 18.77 10 9Bet Crv 12:34:23.2 -23:23:50 2.6 6.88 21 PPM 260814 12:48:26.0 -27:35:52 5.6 1.68 19 PPM 260955 12:54:16.2 -27:57:35 7.3 0.58 19 PPM 260988 12:55:15.0 -28:27:18 9.5 0.13 19 11397_98XX93 12:54:45.8 -28:31:53 15.5 19 Positions are for J2000