Occultation event with (13385) 98XO79, event index number 3569
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/04/02 06:24:15 UTC
J2000 position of star is 11:16:13.4 +09:08:39
Equinox of date position of star is 11:17:35.2 +09:00:02
Star is 29 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=13.9, apparent brightess of occulting body is G=16.1
Use an exposure time of 0.25 seconds with the standard RECON-QHY system.
SNR of 9.4 per integration for unocculted signal
Expected flux drop is 88% with SNR of 8.3 for the occulted depth (per occulted point)
Apparent velocity is 15.1 km/sec on the sky relative to the star, or, 16.5 arcsec/hr.
Position angle of asteroid motion is 121.1 degrees
The recommended exposure time corresponds to 3.8 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 30.1 km.
The sky-plane scale is 3283.7 km/arcsec.
Diameter estimates:
38.7 km assuming a 5% albedo, maximum of 2.6 sec for a central chord
15.8 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 36.1 km used for deployment plan.
Star training set for 13385_98XO79, (2026/04/02 06:24UT) Object RA Dec mag sep mel Regulus 10:09:46.0 +11:50:16 1.3 16.91 45 Denebola 11:50:23.8 +14:25:31 2.1 9.69 27 PPM 128238 11:26:20.5 +11:17:09 5.8 3.14 29 PPM 157726 11:20:28.6 +09:36:25 8.1 0.94 29 PPM 157689 11:17:49.0 +09:11:50 10.4 0.20 29 13385_98XO79 11:17:35.2 +09:00:02 16.1 29 Positions are for equinox of date
Star training set for 13385_98XO79, (2026/04/02 06:24UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 16.91 45 Denebola 11:49:02.7 +14:34:16 2.1 9.69 27 PPM 128238 11:24:58.8 +11:25:49 5.8 3.14 29 PPM 157726 11:19:06.9 +09:45:03 8.1 0.94 29 PPM 157689 11:16:27.2 +09:20:27 10.4 0.20 29 13385_98XO79 11:16:13.4 +09:08:39 16.1 29 Positions are for J2000