Occultation event with (22180) 00YZ, event index number 4371
Regions able to see the event: UAE
Geocentric closest approach at 2026/10/09 21:49:18 UTC
J2000 position of star is 04:52:41.9 +24:29:38
Equinox of date position of star is 04:54:19.8 +24:32:11
Star is 113 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=15.3
Use an exposure time of 1.35 seconds with the standard RECON-QHY system.
SNR of 3.9 per integration for unocculted signal
Expected flux drop is 27% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 7.3 km/sec on the sky relative to the star, or, 8.6 arcsec/hr.
Position angle of asteroid motion is 27.9 degrees
The recommended exposure time corresponds to 9.9 km per image.
The 1-sigma error in the time of the event is 2.5 seconds.
The 1-sigma cross-track error in the shadow position is 22.5 km.
The sky-plane scale is 3077.2 km/arcsec.
Diameter estimates:
53.5 km assuming a 5% albedo, maximum of 7.3 sec for a central chord
21.8 km assuming a 30% albedo, maximum of 3.0 sec for a central chord
Cross-track diameter of 39.8 km used for deployment plan.
Star training set for 22180_00YZ, (2026/10/09 21:49UT) Object RA Dec mag sep mel Aldebaran 04:37:27.6 +16:33:39 0.8 8.90 117 Alnath 05:27:59.2 +28:37:39 1.6 8.56 105 98 Tau 04:59:47.9 +25:05:21 5.8 1.36 112 PPM 093877 04:56:15.2 +23:58:45 8.5 0.71 112 PPM 093822 04:52:52.7 +24:20:03 9.4 0.39 113 22180_00YZ 04:54:19.8 +24:32:11 15.3 112 Positions are for equinox of date
Star training set for 22180_00YZ, (2026/10/09 21:49UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 8.90 117 Alnath 05:26:17.6 +28:36:22 1.6 8.56 105 98 Tau 04:58:09.4 +25:03:00 5.8 1.36 112 PPM 093877 04:54:37.6 +23:56:16 8.5 0.71 112 PPM 093822 04:51:14.9 +24:17:26 9.4 0.39 113 22180_00YZ 04:52:41.9 +24:29:38 15.3 113 Positions are for J2000