Event between (469987) 06HJ123 and star UC4-369-074504 with event index number of 147353
Geocentric closest approach at 2018/05/19 15:28:50 UTC
J2000 position of star is 16:12:12.1 -16:18:35
Equinox of date position of star is 16:13:13.4 -16:21:17
Stellar brightness R=15.1,
use SENSEUP=128
Star is 129 degrees from the moon.
Moon is 23% illuminated.
TNO apparent brightness V=21.2
TNO is 34.1 AU from the Sun
and 33.1 AU from the Earth.
The TNO is moving 24.2
km/sec on the sky relative to the star, or,
3.6 arcsec/hr.
The 1-sigma error in the time of the event is 96 seconds.
The 1-sigma cross-track error in the shadow position is
1391 km.
The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 16.5 sec chord
Diameter=162.5 km assuming a 30% albedo -- 6.7 sec chord
Dynamical classification is 3:2E
Star training set for 469987, (2018/05/19 15:29UT) Object RA Dec mag sep mel Antares 16:30:32.2 -26:28:17 0.9 10.88 134 8Bet1Sco 16:06:30.5 -19:51:16 2.6 3.85 128 PPM 231511 16:20:02.8 -14:54:59 5.8 2.18 130 PPM 231403 16:15:19.3 -16:35:10 8.3 0.55 129 PPM 231327 16:12:38.8 -16:22:29 10.0 0.15 129 469987 16:13:15.0 -16:21:21 15.1 129 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 469987, (2018/05/19 15:29UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 10.88 134 8Bet1Sco 16:05:26.2 -19:48:20 2.6 3.85 128 PPM 231511 16:19:00.4 -14:52:22 5.8 2.18 130 PPM 231403 16:14:16.3 -16:32:27 8.3 0.55 129 PPM 231327 16:11:35.8 -16:19:42 10.0 0.15 129 469987 16:12:12.1 -16:18:35 15.1 129 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:33:26 UT
Marc W. Buie, Southwest Research Institute