Occultation event with (13385) 98XO79, event index number 3765
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/05/29 01:56:11 UTC
J2000 position of star is 11:09:59.6 +10:20:22
Equinox of date position of star is 11:11:22.2 +10:11:45
Star is 59 degrees from the moon. Moon is 95% illuminated.
Stellar brightness G=12.1, apparent brightess of occulting body is G=16.7
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 20.7 per integration for unocculted signal
Expected flux drop is 99% with SNR of 20.4 for the occulted depth (per occulted point)
Apparent velocity is 8.0 km/sec on the sky relative to the star, or, 7.6 arcsec/hr.
Position angle of asteroid motion is 107.7 degrees
The recommended exposure time corresponds to 1.0 km per image.
The 1-sigma error in the time of the event is 2.2 seconds.
The 1-sigma cross-track error in the shadow position is 35.7 km.
The sky-plane scale is 3782.1 km/arcsec.
Diameter estimates:
38.7 km assuming a 5% albedo, maximum of 4.8 sec for a central chord
15.8 km assuming a 30% albedo, maximum of 2.0 sec for a central chord
Cross-track diameter of 36.1 km used for deployment plan.
Star training set for 13385_98XO79, (2026/05/29 01:56UT) Object RA Dec mag sep mel Regulus 10:09:46.5 +11:50:14 1.3 15.20 73 68Del Leo 11:15:30.5 +20:22:43 2.6 10.23 64 63Chi Leo 11:06:22.7 +07:11:34 4.6 3.25 58 PPM 128022 11:11:10.5 +10:00:49 8.3 0.19 59 PPM 128039 11:12:07.2 +10:13:25 9.8 0.19 59 13385_98XO79 11:11:22.2 +10:11:45 16.7 58 Positions are for equinox of date
Star training set for 13385_98XO79, (2026/05/29 01:56UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 15.20 73 68Del Leo 11:14:06.8 +20:31:22 2.6 10.23 64 63Chi Leo 11:05:00.4 +07:20:08 4.6 3.25 58 PPM 128022 11:09:47.9 +10:09:26 8.3 0.19 59 PPM 128039 11:10:44.6 +10:22:02 9.8 0.19 59 13385_98XO79 11:09:59.6 +10:20:22 16.7 59 Positions are for J2000