Event between (123509) 00WK183 and star GA1100:02277084 with event index number of 2142581
Geocentric closest approach at 2026/12/17 23:45:00 UTC
J2000 position of star is 06:37:55.8 +21:08:12
Equinox of date position of star is 06:39:14.9 +21:06:58
Stellar brightness G=13.2,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 94 degrees from the moon.
Moon is 58% 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 24.8
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 304 seconds.
The 1-sigma cross-track error in the shadow position is
1899 km.
The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 12.2 sec chord
Diameter=123.3 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is CLASSICAL
Star training set for 123509, (2026/12/17 23:43UT) Object RA Dec mag sep mel Pollux 07:46:58.0 +27:57:32 1.1 16.77 108 Alhena 06:39:16.1 +16:22:26 1.9 4.74 95 PPM 096308 06:40:42.6 +22:00:17 6.0 0.93 94 PPM 096223 06:37:13.1 +20:51:53 8.4 0.60 94 PPM 096276 06:39:21.5 +21:25:35 9.9 0.32 94 PPM 096267 06:39:11.8 +21:03:12 10.5 0.10 94 123509 06:39:32.4 +21:06:41 13.2 94 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, (2026/12/17 23:43UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 16.77 108 Alhena 06:37:42.8 +16:23:57 1.9 4.74 95 PPM 096308 06:39:05.3 +22:01:51 6.0 0.93 94 PPM 096223 06:35:36.6 +20:53:18 8.4 0.60 94 PPM 096276 06:37:44.6 +21:27:05 9.9 0.32 94 PPM 096267 06:37:35.3 +21:04:42 10.5 0.10 94 123509 06:37:55.8 +21:08:12 13.2 94 Positions are for J2000
Event circumstances last updated at 2022/01/19 23:49:29 UT
Marc W. Buie, Southwest Research Institute