Occultation event with (32499) 00YS11, event index number 4555
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/11/03 07:04:07 UTC
J2000 position of star is 05:12:05.2 +24:21:15
Equinox of date position of star is 05:13:43.6 +24:23:05
Star is 70 degrees from the moon. Moon is 34% illuminated.
Stellar brightness G=14.1, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.30 seconds with the standard RECON-QHY system.
SNR of 9.2 per integration for unocculted signal
Expected flux drop is 84% with SNR of 7.7 for the occulted depth (per occulted point)
Apparent velocity is 12.9 km/sec on the sky relative to the star, or, 13.8 arcsec/hr.
Position angle of asteroid motion is 103.1 degrees
The recommended exposure time corresponds to 3.9 km per image.
The 1-sigma error in the time of the event is 0.4 seconds.
The 1-sigma cross-track error in the shadow position is 32.4 km.
The sky-plane scale is 3359.6 km/arcsec.
Diameter estimates:
45.1 km assuming a 5% albedo, maximum of 3.5 sec for a central chord
18.4 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 38.9 km used for deployment plan.
Star training set for 32499_00YS11, (2026/11/03 07:04UT) Object RA Dec mag sep mel Aldebaran 04:37:27.8 +16:33:40 0.8 11.54 79 Alnath 05:27:59.5 +28:37:39 1.6 5.31 67 103 Tau 05:09:44.9 +24:17:53 5.3 0.91 71 PPM 094178 05:14:41.9 +24:25:36 8.4 0.23 70 PPM 094167 05:13:50.0 +24:18:34 8.6 0.08 70 32499_00YS11 05:13:43.6 +24:23:05 16.0 70 Positions are for equinox of date
Star training set for 32499_00YS11, (2026/11/03 07:04UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 11.54 79 Alnath 05:26:17.6 +28:36:22 1.6 5.31 67 103 Tau 05:08:06.6 +24:15:54 5.3 0.91 71 PPM 094178 05:13:03.4 +24:23:48 8.4 0.23 70 PPM 094167 05:12:11.6 +24:16:45 8.6 0.08 70 32499_00YS11 05:12:05.2 +24:21:15 16.0 70 Positions are for J2000