Event between (15810) 94JR1 and star UC4-351-171054 with event index number of 63392
Geocentric closest approach at 2017/06/21 21:15:31 UTC
J2000 position of star is 19:09:53.2 -19:59:52
Equinox of date position of star is 19:10:53.1 -19:58:09
Stellar brightness R=15.5
Star is 133 degrees from the moon.
Moon is 8% illuminated.
TNO apparent brightness V=23.2
TNO is 35.6 AU from the Sun
and 34.6 AU from the Earth.
The TNO is moving 22.9
km/sec on the sky relative to the star, or,
3.3 arcsec/hr.
The 1-sigma error in the time of the event is 160 seconds.
The 1-sigma cross-track error in the shadow position is
1501 km.
The TNO has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 7.6 sec chord
Diameter=70.9 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is 3:2E
Star training set for 15810, (2017/06/21 21:16UT) Object RA Dec mag sep mel Antares 16:30:28.9 -26:28:10 0.9 37.28 166 Nunki 18:56:20.8 -26:16:25 2.0 7.14 136 PPM 235581 19:10:49.9 -19:46:29 6.4 0.19 133 PPM 269387 19:10:40.9 -20:00:42 8.4 0.07 133 15810 19:10:55.0 -19:58:06 15.5 132 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 15810, (2017/06/21 21:16UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:55 0.9 37.28 166 Nunki 18:55:15.9 -26:17:49 2.0 7.14 136 PPM 235581 19:09:48.2 -19:48:15 6.4 0.19 133 PPM 269387 19:09:39.1 -20:02:28 8.4 0.07 133 15810 19:09:53.2 -19:59:52 15.5 133 Positions are for J2000
Event circumstances last updated at 2016/11/30 19:07:46 UT
Marc W. Buie, Southwest Research Institute