Event between (469420) 01XP254 and star UC4-539-046518 with event index number of 148290
Geocentric closest approach at 2017/05/13 09:57:59 UTC
J2000 position of star is 08:46:41.7 +17:39:34
Equinox of date position of star is 08:47:38.2 +17:35:52
Stellar brightness R=16.1
Star is 131 degrees from the moon.
Moon is 94% illuminated.
TNO apparent brightness V=22.8
TNO is 33.1 AU from the Sun
and 33.3 AU from the Earth.
The TNO is moving 12.1
km/sec on the sky relative to the star, or,
1.8 arcsec/hr.
The 1-sigma error in the time of the event is 234 seconds.
The 1-sigma cross-track error in the shadow position is
1809 km.
The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 16.5 sec chord
Diameter=81.5 km assuming a 30% albedo -- 6.7 sec chord
Dynamical classification is 5:3EE
Star training set for 469420, (2017/05/13 09:58UT) Object RA Dec mag sep mel Pollux 07:46:22.6 +27:58:58 1.1 17.51 145 47Del Cnc 08:45:40.2 +18:05:22 3.9 0.69 131 PPM 125723 08:47:28.3 +17:25:53 8.1 0.17 131 469420 08:47:40.6 +17:35:43 16.1 131 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 469420, (2017/05/13 09:58UT) Object RA Dec mag sep mel Pollux 07:45:18.2 +28:01:33 1.1 17.51 145 47Del Cnc 08:44:41.1 +18:09:12 3.9 0.69 131 PPM 125723 08:46:29.4 +17:29:45 8.1 0.17 131 469420 08:46:41.7 +17:39:34 16.1 131 Positions are for J2000
Event circumstances last updated at 2016/09/01 18:13:07 UT
Marc W. Buie, Southwest Research Institute