Event between (29981) 99TD10 and star UC4-537-029214 with event index number of 67911
Geocentric closest approach at 2017/04/15 23:43:23 UTC
J2000 position of star is 06:33:19.1 +17:20:03
Equinox of date position of star is 06:34:15.7 +17:19:15
Stellar brightness R=14.8
Star is 161 degrees from the moon.
Moon is 81% illuminated.
TNO apparent brightness V=23.5
TNO is 28.4 AU from the Sun
and 28.7 AU from the Earth.
The TNO is moving 14.2
km/sec on the sky relative to the star, or,
2.4 arcsec/hr.
The 1-sigma error in the time of the event is 442 seconds.
The 1-sigma cross-track error in the shadow position is
1537 km.
The TNO has an absolute magnitude Hv=8.7
Diameter=109.7 km assuming a 5% albedo -- 7.7 sec chord
Diameter=44.8 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is CENTAURR
Star training set for 29981, (2017/04/15 23:43UT) Object RA Dec mag sep mel Betelgeuse 05:56:06.5 +07:24:32 0.4 13.60 165 Alhena 06:38:42.6 +16:22:59 1.9 1.41 159 PPM 122879 06:42:21.8 +16:22:48 5.9 2.14 158 PPM 122658 06:34:18.0 +17:23:43 8.5 0.08 161 PPM 122656 06:34:14.2 +17:18:17 10.5 0.03 161 29981 06:34:19.4 +17:19:12 14.8 160 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 17:20:24 UT
Marc W. Buie, Southwest Research Institute