Event between (10370) Hylonome and star UC4-355-137966 with event index number of 73881
Geocentric closest approach at 2017/06/30 21:30:10 UTC
J2000 position of star is 18:25:14.7 -19:01:15
Equinox of date position of star is 18:26:14.6 -19:00:37
Stellar brightness R=15.5
Star is 88 degrees from the moon.
Moon is 49% illuminated.
TNO apparent brightness V=22.3
TNO is 23.7 AU from the Sun
and 22.7 AU from the Earth.
The TNO is moving 23.1
km/sec on the sky relative to the star, or,
5.1 arcsec/hr.
The 1-sigma error in the time of the event is 767 seconds.
The 1-sigma cross-track error in the shadow position is
1677 km.
The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 5.0 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
Star training set for 10370, (2017/06/30 21:30UT) Object RA Dec mag sep mel Antares 16:30:29.0 -26:28:10 0.9 27.65 63 Nunki 18:56:20.9 -26:16:25 2.0 10.04 95 PPM 234421 18:22:24.7 -18:51:03 5.9 0.93 87 PPM 234480 18:25:05.6 -19:23:00 7.9 0.47 88 PPM 234517 18:26:17.8 -19:02:38 9.0 0.03 88 10370 18:26:16.5 -19:00:36 15.5 88 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 10370, (2017/06/30 21:30UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:55 0.9 27.65 63 Nunki 18:55:15.9 -26:17:49 2.0 10.04 95 PPM 234421 18:21:23.0 -18:51:36 5.9 0.93 87 PPM 234480 18:24:03.6 -19:23:37 7.9 0.47 88 PPM 234517 18:25:16.0 -19:03:18 9.0 0.03 88 10370 18:25:14.7 -19:01:15 15.5 88 Positions are for J2000
Event circumstances last updated at 2016/12/09 18:50:17 UT
Marc W. Buie, Southwest Research Institute