Event between (181855) 98WT31 and star GA1340:03339478 with event index number of 1641299
Geocentric closest approach at 2026/12/03 18:07:14 UTC
J2000 position of star is 05:49:09.3 +45:23:57
Equinox of date position of star is 05:50:57.5 +45:24:18
Stellar brightness G=15.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 104 degrees from the moon.
Moon is 25% illuminated.
Apparent brightness V=23.5
Object is 37.7 AU from the Sun
and 36.8 AU from the Earth.
Apparent velocity is 24.5
km/sec on the sky relative to the star, or,
3.3 arcsec/hr.
The 1-sigma error in the time of the event is 516 seconds.
The 1-sigma cross-track error in the shadow position is
5747 km.
The object has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 7.1 sec chord
Diameter=70.9 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is SCATEXTD
Star training set for 181855, (2026/12/03 18:07UT) Object RA Dec mag sep mel Pollux 07:46:57.8 +27:57:32 1.1 28.78 79 34Bet Aur 06:01:30.3 +44:56:50 1.9 1.88 102 35Pi Aur 06:01:56.1 +45:56:10 5.9 1.96 102 PPM 048461 05:50:42.9 +45:14:37 8.0 0.18 104 PPM 048466 05:51:19.5 +45:20:20 9.5 0.07 104 181855 05:51:08.5 +45:24:20 15.4 104 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 181855, (2026/12/03 18:07UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 28.78 79 34Bet Aur 05:59:31.6 +44:56:51 1.9 1.88 102 35Pi Aur 05:59:56.1 +45:56:12 5.9 1.96 102 PPM 048461 05:48:43.9 +45:14:13 8.0 0.18 104 PPM 048466 05:49:20.3 +45:19:57 9.5 0.07 104 181855 05:49:09.3 +45:23:57 15.4 104 Positions are for J2000
Event circumstances last updated at 2024/06/10 01:53:04 UT
Marc W. Buie, Southwest Research Institute