Event between (131697) 01XH255 and star UC4-535-048992 with event index number of 80146
Geocentric closest approach at 2017/05/15 22:30:09 UTC
J2000 position of star is 09:06:06.8 +16:59:44
Equinox of date position of star is 09:07:01.9 +16:55:45
Stellar brightness R=14.2
Star is 156 degrees from the moon.
Moon is 79% illuminated.
TNO apparent brightness V=23.6
TNO is 33.1 AU from the Sun
and 33.2 AU from the Earth.
The TNO is moving 10.6
km/sec on the sky relative to the star, or,
1.6 arcsec/hr.
The 1-sigma error in the time of the event is 566 seconds.
The 1-sigma cross-track error in the shadow position is
2886 km.
The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 13.0 sec chord
Diameter=56.4 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is 5:4E
Star training set for 131697, (2017/05/15 22:30UT) Object RA Dec mag sep mel Regulus 10:09:17.7 +11:52:54 1.3 15.88 140 63Omi2Cnc 08:58:33.3 +15:30:49 5.8 2.49 158 PPM 126110 09:07:13.9 +17:02:29 8.1 0.12 156 131697 09:07:05.0 +16:55:31 14.2 156 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 131697, (2017/05/15 22:30UT) Object RA Dec mag sep mel Regulus 10:08:22.0 +11:58:02 1.3 15.88 140 63Omi2Cnc 08:57:35.2 +15:34:53 5.8 2.49 158 PPM 126110 09:06:15.6 +17:06:42 8.1 0.12 156 131697 09:06:06.8 +16:59:44 14.2 156 Positions are for J2000
Event circumstances last updated at 2016/06/09 19:23:53 UT
Marc W. Buie, Southwest Research Institute