Event between (69990) 98WU31 and star GA1060:02535092 with event index number of 1795554
Geocentric closest approach at 2027/12/03 02:27:36 UTC
J2000 position of star is 06:58:35.7 +17:53:07
Equinox of date position of star is 07:00:01.2 +17:51:01
Stellar brightness G=8.9,
use SENSEUP=2 with the MallinCam and and exposure
time of 125 milli-seconds with the QHY174 camera.
Star is 157 degrees from the moon.
Moon is 22% illuminated.
Apparent brightness V=24.0
Object is 37.2 AU from the Sun
and 36.4 AU from the Earth.
Apparent velocity is 20.5
km/sec on the sky relative to the star, or,
2.8 arcsec/hr.
The 1-sigma error in the time of the event is 1021 seconds.
The 1-sigma cross-track error in the shadow position is
5110 km.
The object has an absolute magnitude Hv=8.2
Diameter=144.5 km assuming a 5% albedo -- 6.8 sec chord
Diameter=59.0 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is 3:2E
Star training set for 69990, (2027/12/03 02:28UT) Object RA Dec mag sep mel Pollux 07:47:01.5 +27:57:23 1.1 14.76 165 Alhena 06:39:19.5 +16:22:23 1.9 5.20 151 PPM 123373 07:01:54.0 +15:29:38 6.4 2.39 157 PPM 123314 06:59:20.5 +17:51:45 6.7 0.21 156 PPM 123350 07:00:57.9 +17:47:21 9.3 0.19 157 69990 07:00:13.2 +17:50:44 8.9 157 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, (2027/12/03 02:28UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 14.76 165 Alhena 06:37:42.8 +16:23:57 1.9 5.20 151 PPM 123373 07:00:18.1 +15:32:06 6.4 2.39 157 PPM 123314 06:57:43.0 +17:54:07 6.7 0.21 156 PPM 123350 06:59:20.5 +17:49:46 9.3 0.19 157 69990 06:58:35.7 +17:53:07 8.9 157 Positions are for J2000
Event circumstances last updated at 2024/06/22 21:29:22 UT
Marc W. Buie, Southwest Research Institute