Occultation event with (22180) 00YZ, event index number 1497
Regions able to see the event: Australia
Geocentric closest approach at 2025/11/12 10:59:02 UTC
J2000 position of star is 01:26:37.7 +31:13:07
Equinox of date position of star is 01:28:05.0 +31:21:08
Star is 109 degrees from the moon. Moon is 48% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=14.9
Use an exposure time of 0.55 seconds with the standard RECON-QHY system.
SNR of 5.2 per integration for unocculted signal
Expected flux drop is 41% with SNR of 2.1 for the occulted depth (per occulted point)
Apparent velocity is 18.0 km/sec on the sky relative to the star, or, 22.9 arcsec/hr.
Position angle of asteroid motion is 37.0 degrees
The recommended exposure time corresponds to 9.9 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 16.5 km.
The sky-plane scale is 2825.7 km/arcsec.
Diameter estimates:
53.5 km assuming a 5% albedo, aximum of 3.0 sec for a central chord
21.8 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 39.8 km used for deployment plan.
Star training set for 22180_00YZ, (2025/11/12 10:59UT) Object RA Dec mag sep mel Aldebaran 04:37:24.5 +16:33:33 0.8 45.33 74 Hamal 02:08:38.3 +23:35:01 2.0 11.87 105 82 Psc 01:12:32.8 +31:33:41 5.2 3.32 112 PPM 066336 01:30:55.2 +31:01:37 8.4 0.69 109 PPM 066275 01:27:03.5 +31:26:00 8.7 0.23 109 22180_00YZ 01:28:05.0 +31:21:08 14.9 109 Positions are for equinox of date
Star training set for 22180_00YZ, (2025/11/12 10:59UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 45.33 74 Hamal 02:07:10.8 +23:27:41 2.0 11.87 105 82 Psc 01:11:06.8 +31:25:28 5.2 3.32 112 PPM 066336 01:29:27.7 +30:53:38 8.4 0.69 109 PPM 066275 01:25:36.2 +31:17:58 8.7 0.23 109 22180_00YZ 01:26:37.7 +31:13:07 14.9 109 Positions are for J2000