Event between (443843) 01FO185 and star UC4-388-064240 with event index number of 87785
Geocentric closest approach at 2017/04/26 23:44:58 UTC
J2000 position of star is 14:41:51.1 -12:31:17
Equinox of date position of star is 14:42:44.1 -12:35:24
Stellar brightness R=16.5
Star is 178 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=23.5
TNO is 42.1 AU from the Sun
and 41.1 AU from the Earth.
The TNO is moving 24.7
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 174 seconds.
The 1-sigma cross-track error in the shadow position is
2378 km.
The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 8.5 sec chord
Diameter=85.3 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is CLASSICAL
Star training set for 443843, (2017/04/26 23:45UT) Object RA Dec mag sep mel Spica 13:26:06.5 -11:15:04 1.0 18.80 159 27Bet Lib 15:17:56.5 -09:26:45 2.6 9.18 173 PPM 229046 14:37:55.3 -12:22:42 6.2 1.21 177 PPM 229169 14:43:16.6 -12:13:38 8.4 0.39 178 PPM 229145 14:42:28.9 -12:47:37 8.8 0.21 177 443843 14:42:47.7 -12:35:41 16.5 178 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.
Event circumstances last updated at 2016/03/20 17:20:51 UT
Marc W. Buie, Southwest Research Institute