Occultation event with (22180) 00YZ, event index number 4466
Regions able to see the event: UAE
Geocentric closest approach at 2026/10/23 21:55:15 UTC
J2000 position of star is 04:49:34.5 +23:42:34
Equinox of date position of star is 04:51:12.0 +23:45:15
Star is 73 degrees from the moon. Moon is 94% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 6.5 per integration for unocculted signal
Expected flux drop is 45% with SNR of 2.9 for the occulted depth (per occulted point)
Apparent velocity is 11.9 km/sec on the sky relative to the star, or, 14.5 arcsec/hr.
Position angle of asteroid motion is 50.4 degrees
The recommended exposure time corresponds to 9.5 km per image.
The 1-sigma error in the time of the event is 0.7 seconds.
The 1-sigma cross-track error in the shadow position is 28.2 km.
The sky-plane scale is 2956.9 km/arcsec.
Diameter estimates:
53.5 km assuming a 5% albedo, maximum of 4.5 sec for a central chord
21.8 km assuming a 30% albedo, maximum of 1.8 sec for a central chord
Cross-track diameter of 39.8 km used for deployment plan.
Star training set for 22180_00YZ, (2026/10/23 21:55UT) Object RA Dec mag sep mel Aldebaran 04:37:27.7 +16:33:40 0.8 7.88 69 Alnath 05:27:59.3 +28:37:39 1.6 9.58 81 PPM 093742 04:47:19.8 +23:40:31 6.1 0.89 72 PPM 093805 04:51:25.4 +23:26:24 9.3 0.32 73 PPM 093782 04:49:53.3 +23:48:28 10.8 0.30 72 22180_00YZ 04:51:12.0 +23:45:15 15.1 73 Positions are for equinox of date
Star training set for 22180_00YZ, (2026/10/23 21:55UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 7.88 69 Alnath 05:26:17.6 +28:36:22 1.6 9.58 81 PPM 093742 04:45:42.5 +23:37:41 6.1 0.89 72 PPM 093805 04:49:48.1 +23:23:44 9.3 0.32 73 PPM 093782 04:48:15.8 +23:45:44 10.8 0.30 72 22180_00YZ 04:49:34.5 +23:42:34 15.1 73 Positions are for J2000