Event between (471931) 13PH44 and star UC4-399-135078 with event index number of 144526
Geocentric closest approach at 2017/09/08 15:08:20 UTC
J2000 position of star is 23:47:20.4 -10:15:35
Equinox of date position of star is 23:48:11.9 -10:10:01
Stellar brightness R=14.4
Star is 23 degrees from the moon.
Moon is 94% illuminated.
TNO apparent brightness V=21.0
TNO is 15.6 AU from the Sun
and 14.6 AU from the Earth.
The TNO is moving 23.0
km/sec on the sky relative to the star, or,
7.8 arcsec/hr.
The 1-sigma error in the time of the event is 89 seconds.
The 1-sigma cross-track error in the shadow position is
1702 km.
The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 4.0 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
Star training set for 471931, (2017/09/08 15:08UT) Object RA Dec mag sep mel Fomalhaut 22:58:37.4 -29:31:41 1.2 22.57 44 Diphda 00:44:28.6 -17:53:23 2.0 15.66 21 PPM 208022 23:51:09.5 -09:52:32 5.9 0.77 22 PPM 207973 23:48:33.5 -09:49:55 8.2 0.34 22 PPM 242129 23:49:08.1 -10:11:17 9.5 0.22 22 471931 23:48:15.0 -10:09:41 14.4 22 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 471931, (2017/09/08 15:08UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.5 -29:37:23 1.2 22.57 44 Diphda 00:43:35.6 -17:59:11 2.0 15.66 21 PPM 208022 23:50:14.9 -09:58:26 5.9 0.77 22 PPM 207973 23:47:38.9 -09:55:49 8.2 0.34 22 PPM 242129 23:48:13.5 -10:17:11 9.5 0.22 22 471931 23:47:20.4 -10:15:35 14.4 23 Positions are for J2000
Event circumstances last updated at 2016/09/01 18:16:09 UT
Marc W. Buie, Southwest Research Institute