Event between 04OQ15 and star UC4-347-186710 with event index number of 98487
Geocentric closest approach at 2017/04/03 22:30:49 UTC
J2000 position of star is 20:47:58.9 -20:45:18
Equinox of date position of star is 20:48:54.8 -20:41:40
Stellar brightness R=13.4
Star is 157 degrees from the moon.
Moon is 52% illuminated.
TNO apparent brightness V=23.2
TNO is 39.3 AU from the Sun
and 39.7 AU from the Earth.
The TNO is moving 17.9
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 386 seconds.
The 1-sigma cross-track error in the shadow position is
1898 km.
The TNO has an absolute magnitude Hv=7.1
Diameter=227.0 km assuming a 5% albedo -- 12.7 sec chord
Diameter=92.7 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is CLASSICAL
Star training set for 04OQ15, (2017/04/03 22:31UT) Object RA Dec mag sep mel Fomalhaut 22:58:36.0 -29:31:49 1.2 30.53 127 38Zet Sgr 19:03:42.5 -29:51:15 2.7 25.43 169 17 Cap 20:47:09.9 -21:27:01 5.9 0.87 157 PPM 271559 20:45:48.9 -20:49:47 7.9 0.75 157 PPM 271637 20:49:04.1 -20:47:25 9.6 0.10 157 04OQ15 20:48:58.4 -20:41:26 13.4 156 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.
Event circumstances last updated at 2016/03/14 18:00:15 UT
Marc W. Buie, Southwest Research Institute