Event between (471143) 10EK139 and star UC4-261-068537 with event index number of 146009
Geocentric closest approach at 2017/05/20 04:25:24 UTC
J2000 position of star is 13:46:47.3 -37:54:26
Equinox of date position of star is 13:47:48.9 -37:59:37
Stellar brightness R=16.2,
use SENSEUP=128
Star is 120 degrees from the moon.
Moon is 38% illuminated.
TNO apparent brightness V=19.6
TNO is 36.7 AU from the Sun
and 35.8 AU from the Earth.
The TNO is moving 22.4
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 109 seconds.
The 1-sigma cross-track error in the shadow position is
2310 km.
The TNO has an absolute magnitude Hv=3.9
Diameter=1000.0 km assuming a 5% albedo -- 44.6 sec chord
Diameter=408.3 km assuming a 30% albedo -- 18.2 sec chord
Dynamical classification is 7:2EEEEE
Star training set for 471143, (2017/05/20 04:25UT) Object RA Dec mag sep mel Hadar 14:05:03.9 -60:27:21 0.6 22.63 103 5The Cen 14:07:42.7 -36:27:17 2.1 4.25 118 PPM 291811 13:47:57.5 -36:20:18 5.1 1.66 121 PPM 291833 13:49:16.9 -38:20:56 7.7 0.46 120 PPM 291812 13:47:58.0 -37:56:24 9.3 0.06 120 471143 13:47:48.9 -37:59:37 16.2 120 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, (2017/05/20 04:25UT) Object RA Dec mag sep mel Hadar 14:03:49.3 -60:22:23 0.6 22.63 103 5The Cen 14:06:40.2 -36:22:21 2.1 4.25 118 PPM 291811 13:46:56.3 -36:15:07 5.1 1.66 121 PPM 291833 13:48:15.1 -38:15:46 7.7 0.46 120 PPM 291812 13:46:56.3 -37:51:13 9.3 0.06 120 471143 13:46:47.3 -37:54:26 16.2 120 Positions are for J2000
Event circumstances last updated at 2017/05/16 18:26:48 UT
Marc W. Buie, Southwest Research Institute