Event between 04MT8 and star UC4-346-189131 with event index number of 98414
Geocentric closest approach at 2017/05/19 01:17:36 UTC
J2000 position of star is 20:18:38.6 -20:54:56
Equinox of date position of star is 20:19:35.2 -20:51:50
Stellar brightness R=16.4
Star is 27 degrees from the moon.
Moon is 50% illuminated.
TNO apparent brightness V=23.2
TNO is 44.9 AU from the Sun
and 44.5 AU from the Earth.
The TNO is moving 8.2
km/sec on the sky relative to the star, or,
0.9 arcsec/hr.
The 1-sigma error in the time of the event is 1196 seconds.
The 1-sigma cross-track error in the shadow position is
3534 km.
The TNO has an absolute magnitude Hv=6.6
Diameter=291.1 km assuming a 5% albedo -- 35.4 sec chord
Diameter=118.8 km assuming a 30% albedo -- 14.4 sec chord
Dynamical classification is CLASSICAL
Star training set for 04MT8, (2017/05/19 01:18UT) Object RA Dec mag sep mel Fomalhaut 22:58:36.4 -29:31:47 1.2 36.80 22 38Zet Sgr 19:03:42.9 -29:51:14 2.7 19.33 45 4 Cap 20:19:02.5 -21:45:18 5.9 0.91 27 PPM 271016 20:21:46.5 -20:44:48 8.5 0.51 26 PPM 270987 20:20:51.6 -20:45:40 9.9 0.30 26 04MT8 20:19:39.3 -20:51:37 16.4 26 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 2016/03/14 18:00:20 UT
Marc W. Buie, Southwest Research Institute