Event between (612083) 98WX31 and star GA1140:03009751 with event index number of 2805283
Geocentric closest approach at 2027/12/05 16:31:25 UTC
J2000 position of star is 07:32:58.5 +24:38:59
Equinox of date position of star is 07:34:22.8 +24:35:55
Stellar brightness G=15.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 133 degrees from the moon.
Moon is 45% illuminated.
Apparent brightness V=22.9
Object is 41.1 AU from the Sun
and 40.4 AU from the Earth.
Apparent velocity is 19.1
km/sec on the sky relative to the star, or,
2.3 arcsec/hr.
The 1-sigma error in the time of the event is 882 seconds.
The 1-sigma cross-track error in the shadow position is
4036 km.
The object has an absolute magnitude Hv=6.7
Diameter=270.4 km assuming a 5% albedo -- 14.2 sec chord
Diameter=110.4 km assuming a 30% albedo -- 5.8 sec chord
Dynamical classification is CLASSICAL
Star training set for 612083, (2027/12/05 16:20UT) Object RA Dec mag sep mel Pollux 07:47:01.5 +27:57:23 1.1 4.36 135 PPM 097796 07:40:53.0 +24:09:24 6.0 1.48 135 PPM 097701 07:36:32.3 +24:53:21 8.2 0.52 134 PPM 097626 07:33:30.0 +24:28:27 10.0 0.29 133 612083 07:34:40.1 +24:35:17 15.5 134 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 612083, (2027/12/05 16:20UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 4.36 135 PPM 097796 07:39:12.0 +24:13:21 6.0 1.48 135 PPM 097701 07:34:50.6 +24:57:08 8.2 0.52 134 PPM 097626 07:31:48.5 +24:32:07 10.0 0.29 133 612083 07:32:58.5 +24:38:59 15.5 133 Positions are for J2000
Event circumstances last updated at 2023/03/04 04:19:28 UT
Marc W. Buie, Southwest Research Institute