Event between (500840) 13GA138 and star UC4-376-069884 with event index number of 220718
Geocentric closest approach at 2018/01/17 03:11:14 UTC
J2000 position of star is 14:50:44.6 -14:59:47
Equinox of date position of star is 14:51:44.0 -15:04:11
Stellar brightness R=14.5,
use SENSEUP=128
Star is 73 degrees from the moon.
Moon is 0% illuminated.
TNO apparent brightness V=24.2
TNO is 42.0 AU from the Sun
and 42.3 AU from the Earth.
The TNO is moving 14.2
km/sec on the sky relative to the star, or,
1.7 arcsec/hr.
The 1-sigma error in the time of the event is 315 seconds.
The 1-sigma cross-track error in the shadow position is
3271 km.
The TNO has an absolute magnitude Hv=7.8
Diameter=166.0 km assuming a 5% albedo -- 11.7 sec chord
Diameter=67.8 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
Star training set for 500840, (2018/01/17 03:11UT) Object RA Dec mag sep mel Spica 13:26:08.8 -11:15:18 1.0 21.17 94 27Bet Lib 15:17:58.8 -09:26:54 2.6 8.52 68 7Mu Lib 14:50:18.6 -14:13:23 5.8 0.92 73 PPM 229377 14:52:03.5 -15:06:04 7.4 0.08 72 500840 14:51:44.5 -15:04:13 14.5 72 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 500840, (2018/01/17 03:11UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 21.17 94 27Bet Lib 15:17:00.3 -09:22:59 2.6 8.52 68 7Mu Lib 14:49:19.0 -14:08:56 5.8 0.92 73 PPM 229377 14:51:03.6 -15:01:39 7.4 0.08 72 500840 14:50:44.6 -14:59:47 14.5 73 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:11:33 UT
Marc W. Buie, Southwest Research Institute