Event between (123509) 00WK183 and star GA1100:02164903 with event index number of 2142487
Geocentric closest approach at 2025/12/22 23:50:06 UTC
J2000 position of star is 06:31:38.9 +21:13:20
Equinox of date position of star is 06:32:58.0 +21:12:18
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 153 degrees from the moon.
Moon is 8% illuminated.
TNO apparent brightness V=22.8
TNO is 42.5 AU from the Sun
and 41.5 AU from the Earth.
The TNO is moving 25.4
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 262 seconds.
The 1-sigma cross-track error in the shadow position is
1720 km.
The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 11.9 sec chord
Diameter=123.3 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
Star training set for 123509, (2025/12/22 23:49UT) Object RA Dec mag sep mel Betelgeuse 05:56:34.7 +07:24:35 0.4 16.39 140 Alhena 06:39:12.7 +16:22:30 1.9 5.03 153 16 Gem 06:29:29.4 +20:28:41 6.1 1.13 152 PPM 096099 06:32:31.3 +21:47:05 8.5 0.60 153 PPM 096122 06:33:58.8 +21:25:20 8.9 0.29 153 123509 06:33:12.2 +21:12:07 16.0 153 Positions are for equinox of date
Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.
Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.
Star training set for 123509, (2025/12/22 23:49UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 16.39 140 Alhena 06:37:42.8 +16:23:57 1.9 5.03 153 16 Gem 06:27:56.7 +20:29:46 6.1 1.13 152 PPM 096099 06:30:57.7 +21:48:17 8.5 0.60 153 PPM 096122 06:32:25.4 +21:26:35 8.9 0.29 153 123509 06:31:38.9 +21:13:20 16.0 153 Positions are for J2000
Event circumstances last updated at 2022/01/07 23:39:04 UT
Marc W. Buie, Southwest Research Institute