Event between (309139) 06XQ51 and star UC4-386-049158 with event index number of 85332
Geocentric closest approach at 2017/10/09 05:38:44 UTC
J2000 position of star is 08:37:22.2 -12:53:25
Equinox of date position of star is 08:38:11.3 -12:57:06
Stellar brightness R=16.1,
use SENSEUP=128
Star is 73 degrees from the moon.
Moon is 85% illuminated.
TNO apparent brightness V=22.6
TNO is 17.4 AU from the Sun
and 17.8 AU from the Earth.
The TNO is moving 24.7
km/sec on the sky relative to the star, or,
6.9 arcsec/hr.
The 1-sigma error in the time of the event is 206 seconds.
The 1-sigma cross-track error in the shadow position is
5439 km.
The TNO has an absolute magnitude Hv=9.8
Diameter=66.1 km assuming a 5% albedo -- 2.7 sec chord
Diameter=27.0 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
Star training set for 309139, (2017/10/09 05:39UT) Object RA Dec mag sep mel Sirius 06:45:55.9 -16:44:29 -1.5 27.37 51 Alphard 09:28:27.6 -08:44:11 2.0 13.04 83 6 Hya 08:40:52.0 -12:32:21 5.0 0.77 74 PPM 220348 08:37:13.2 -13:12:50 8.3 0.35 73 PPM 220383 08:38:32.3 -12:59:26 9.6 0.09 73 309139 08:38:12.6 -12:57:11 16.1 73 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 309139, (2017/10/09 05:39UT) Object RA Dec mag sep mel Sirius 06:45:08.2 -16:43:19 -1.5 27.37 51 Alphard 09:27:35.2 -08:39:31 2.0 13.04 83 6 Hya 08:40:01.4 -12:28:32 5.0 0.77 74 PPM 220348 08:36:22.9 -13:09:05 8.3 0.35 73 PPM 220383 08:37:41.9 -12:55:40 9.6 0.09 73 309139 08:37:22.2 -12:53:25 16.1 73 Positions are for J2000
Event circumstances last updated at 2017/04/24 16:12:07 UT
Marc W. Buie, Southwest Research Institute