Event between (123509) 00WK183 and star GA1100:02232391 with event index number of 2142452
Geocentric closest approach at 2025/09/22 14:35:00 UTC
J2000 position of star is 06:35:20.2 +21:13:30
Equinox of date position of star is 06:36:39.1 +21:12:21
Stellar brightness G=15.6,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 90 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=22.9
TNO is 42.5 AU from the Sun
and 42.7 AU from the Earth.
The TNO is moving 8.8
km/sec on the sky relative to the star, or,
1.0 arcsec/hr.
The 1-sigma error in the time of the event is 811 seconds.
The 1-sigma cross-track error in the shadow position is
2351 km.
The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 34.4 sec chord
Diameter=123.3 km assuming a 30% albedo -- 14.1 sec chord
Dynamical classification is CLASSICAL
Star training set for 123509, (2025/09/22 14:41UT) Object RA Dec mag sep mel Betelgeuse 05:56:33.9 +07:24:35 0.4 16.88 99 Alhena 06:39:11.9 +16:22:30 1.9 4.86 89 PPM 096308 06:40:38.1 +22:00:21 6.0 1.19 90 PPM 096222 06:36:59.4 +21:24:26 7.9 0.21 90 PPM 096211 06:36:33.7 +21:05:09 11.4 0.14 90 123509 06:36:52.4 +21:12:09 15.6 90 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, (2025/09/22 14:41UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 16.88 99 Alhena 06:37:42.8 +16:23:57 1.9 4.86 89 PPM 096308 06:39:05.3 +22:01:51 6.0 1.19 90 PPM 096222 06:35:27.0 +21:25:47 7.9 0.21 90 PPM 096211 06:35:01.5 +21:06:29 11.4 0.14 90 123509 06:35:20.2 +21:13:30 15.6 90 Positions are for J2000
Event circumstances last updated at 2022/01/04 23:28:28 UT
Marc W. Buie, Southwest Research Institute