Occultation event with (22180) 00YZ, event index number 4348
Regions able to see the event: Senegal
Geocentric closest approach at 2026/10/05 02:56:33 UTC
J2000 position of star is 04:53:05.0 +24:43:37
Equinox of date position of star is 04:54:43.1 +24:46:10
Star is 47 degrees from the moon. Moon is 33% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.3
Use an exposure time of 1.55 seconds with the standard RECON-QHY system.
SNR of 5.1 per integration for unocculted signal
Expected flux drop is 32% with SNR of 1.6 for the occulted depth (per occulted point)
Apparent velocity is 6.2 km/sec on the sky relative to the star, or, 7.2 arcsec/hr.
Position angle of asteroid motion is 11.9 degrees
The recommended exposure time corresponds to 9.7 km per image.
The 1-sigma error in the time of the event is 3.8 seconds.
The 1-sigma cross-track error in the shadow position is 16.8 km.
The sky-plane scale is 3123.7 km/arcsec.
Diameter estimates:
53.5 km assuming a 5% albedo, maximum of 8.6 sec for a central chord
21.8 km assuming a 30% albedo, maximum of 3.5 sec for a central chord
Cross-track diameter of 39.8 km used for deployment plan.
Star training set for 22180_00YZ, (2026/10/05 02:57UT) Object RA Dec mag sep mel Aldebaran 04:37:27.6 +16:33:39 0.8 9.15 53 Alnath 05:27:59.2 +28:37:39 1.6 8.37 40 98 Tau 04:59:47.9 +25:05:21 5.8 1.20 46 PPM 093858 04:55:15.1 +25:24:28 7.7 0.65 47 PPM 093855 04:54:56.6 +24:56:41 9.1 0.18 47 22180_00YZ 04:54:43.1 +24:46:10 15.3 47 Positions are for equinox of date
Star training set for 22180_00YZ, (2026/10/05 02:57UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 9.15 53 Alnath 05:26:17.6 +28:36:22 1.6 8.37 40 98 Tau 04:58:09.4 +25:03:00 5.8 1.20 46 PPM 093858 04:53:36.5 +25:21:57 7.7 0.65 47 PPM 093855 04:53:18.4 +24:54:09 9.1 0.18 47 22180_00YZ 04:53:05.0 +24:43:37 15.3 47 Positions are for J2000