Event between (69990) 98WU31 and star GA1080:02109766 with event index number of 1429857
Geocentric closest approach at 2025/04/21 21:09:56 UTC
J2000 position of star is 06:31:23.7 +18:53:44
Equinox of date position of star is 06:32:50.0 +18:52:35
Stellar brightness G=13.3,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 145 degrees from the moon.
Moon is 42% illuminated.
Apparent brightness V=24.0
Object is 36.7 AU from the Sun
and 37.1 AU from the Earth.
Apparent velocity is 16.8
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 612 seconds.
The 1-sigma cross-track error in the shadow position is
3032 km.
The object has an absolute magnitude Hv=8.2
Diameter=144.5 km assuming a 5% albedo -- 8.3 sec chord
Diameter=59.0 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is 3:2E
Star training set for 69990, (2025/04/21 21:10UT) Object RA Dec mag sep mel Betelgeuse 05:56:32.5 +07:24:35 0.4 14.47 133 Alhena 06:39:10.4 +16:22:32 1.9 2.91 146 18Nu Gem 06:30:27.9 +20:11:38 4.1 1.44 144 PPM 122514 06:29:27.7 +18:47:45 8.1 0.81 144 PPM 122648 06:34:23.6 +19:01:54 8.9 0.39 145 PPM 122589 06:32:14.2 +18:33:24 10.1 0.35 144 69990 06:32:53.0 +18:52:33 13.3 145 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 69990, (2025/04/21 21:10UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 14.47 133 Alhena 06:37:42.8 +16:23:57 1.9 2.91 146 18Nu Gem 06:28:57.8 +20:12:43 4.1 1.44 144 PPM 122514 06:27:58.5 +18:48:48 8.1 0.81 144 PPM 122648 06:32:54.2 +19:03:09 8.9 0.39 145 PPM 122589 06:30:45.1 +18:34:34 10.1 0.35 144 69990 06:31:23.7 +18:53:44 13.3 145 Positions are for J2000
Event circumstances last updated at 2024/06/13 03:45:23 UT
Marc W. Buie, Southwest Research Institute