Event between (471143) 10EK139 and star UC4-254-063854 with event index number of 146046
Geocentric closest approach at 2018/02/20 05:01:32 UTC
J2000 position of star is 14:02:48.0 -39:13:05
Equinox of date position of star is 14:03:53.2 -39:18:13
Stellar brightness R=15.0,
use SENSEUP=128
Star is 144 degrees from the moon.
Moon is 18% illuminated.
TNO apparent brightness V=19.7
TNO is 36.4 AU from the Sun
and 36.1 AU from the Earth.
The TNO is moving 14.2
km/sec on the sky relative to the star, or,
1.9 arcsec/hr.
The 1-sigma error in the time of the event is 167 seconds.
The 1-sigma cross-track error in the shadow position is
2437 km.
The TNO has an absolute magnitude Hv=3.9
Diameter=1000.0 km assuming a 5% albedo -- 70.6 sec chord
Diameter=408.3 km assuming a 30% albedo -- 28.8 sec chord
Dynamical classification is 7:2EEEEE
Star training set for 471143, (2018/02/20 05:02UT) Object RA Dec mag sep mel Hadar 14:05:07.2 -60:27:34 0.6 21.16 123 5The Cen 14:07:45.4 -36:27:30 2.1 2.95 147 PPM 319095 14:02:25.2 -40:18:32 5.8 1.04 143 PPM 292109 14:02:22.7 -39:20:25 8.0 0.30 144 PPM 292152 14:04:44.9 -39:21:17 9.0 0.17 144 471143 14:03:54.0 -39:18:17 15.0 144 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 471143, (2018/02/20 05:02UT) Object RA Dec mag sep mel Hadar 14:03:49.3 -60:22:23 0.6 21.16 123 5The Cen 14:06:40.2 -36:22:21 2.1 2.95 147 PPM 319095 14:01:19.0 -40:13:19 5.8 1.04 143 PPM 292109 14:01:16.9 -39:15:12 8.0 0.30 144 PPM 292152 14:03:38.8 -39:16:06 9.0 0.17 144 471143 14:02:48.0 -39:13:05 15.0 144 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:17:23 UT
Marc W. Buie, Southwest Research Institute