Event between 12FK84 and star UC4-457-053794 with event index number of 133289
Geocentric closest approach at 2017/04/25 16:38:05 UTC
J2000 position of star is 14:50:57.1 +01:14:36
Equinox of date position of star is 14:51:50.0 +01:10:21
Stellar brightness R=14.2,
use SENSEUP=64
Star is 160 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=22.3
TNO is 38.9 AU from the Sun
and 37.9 AU from the Earth.
The TNO is moving 24.3
km/sec on the sky relative to the star, or,
3.2 arcsec/hr.
The 1-sigma error in the time of the event is 756 seconds.
The 1-sigma cross-track error in the shadow position is
5983 km.
The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 13.0 sec chord
Diameter=129.1 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is SCATEXTD
Star training set for 12FK84, (2017/04/25 16:38UT) Object RA Dec mag sep mel Arcturus 14:16:27.1 +19:05:34 0.0 19.91 153 27Bet Lib 15:17:56.5 -09:26:45 2.6 12.45 155 109 Vir 14:47:07.5 +01:49:15 3.7 1.34 161 PPM 161020 14:52:01.7 +00:29:10 8.2 0.69 160 PPM 161001 14:50:31.2 +01:26:00 9.2 0.42 160 PPM 161019 14:52:00.8 +01:30:42 11.2 0.34 160 12FK84 14:51:50.1 +01:10:21 14.2 160 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 12FK84, (2017/04/25 16:38UT) Object RA Dec mag sep mel Arcturus 14:15:38.3 +19:10:22 0.0 19.91 153 27Bet Lib 15:17:00.3 -09:22:59 2.6 12.45 155 109 Vir 14:46:14.8 +01:53:34 3.7 1.34 161 PPM 161020 14:51:08.6 +00:33:24 8.2 0.69 160 PPM 161001 14:49:38.4 +01:30:16 9.2 0.42 160 PPM 161019 14:51:08.0 +01:34:57 11.2 0.34 160 12FK84 14:50:57.1 +01:14:36 14.2 160 Positions are for J2000
Event circumstances last updated at 2017/04/24 16:03:32 UT
Marc W. Buie, Southwest Research Institute