Event between (69990) 98WU31 and star GA1080:01368378 with event index number of 352342
Geocentric closest approach at 2019/01/30 10:52:04 UTC
J2000 position of star is 05:48:21.3 +19:55:24
Equinox of date position of star is 05:49:28.7 +19:55:42
Stellar brightness G=16.8,
use SENSEUP=128
Star is 163 degrees from the moon.
Moon is 25% illuminated.
TNO apparent brightness V=23.7
TNO is 35.6 AU from the Sun
and 34.8 AU from the Earth.
The TNO is moving 17.3
km/sec on the sky relative to the star, or,
2.5 arcsec/hr.
The 1-sigma error in the time of the event is 214 seconds.
The 1-sigma cross-track error in the shadow position is
1322 km.
The TNO has an absolute magnitude Hv=8.1
Diameter=144.5 km assuming a 5% albedo -- 8.4 sec chord
Diameter=59.0 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is 3:2E
Star training set for 69990, (2019/01/30 10:52UT) Object RA Dec mag sep mel Betelgeuse 05:56:12.3 +07:24:33 0.4 12.62 158 Alnath 05:27:30.0 +28:37:18 1.6 10.03 165 PPM 121513 05:53:31.3 +19:52:16 6.4 0.95 162 PPM 121502 05:52:59.8 +19:31:29 7.1 0.92 163 PPM 121423 05:49:58.3 +19:55:49 8.8 0.11 163 69990 05:49:29.2 +19:55:43 16.8 163 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 69990, (2019/01/30 10:52UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 12.62 158 Alnath 05:26:17.5 +28:36:23 1.6 10.03 165 PPM 121513 05:52:23.4 +19:52:04 6.4 0.95 162 PPM 121502 05:51:52.1 +19:31:17 7.1 0.92 163 PPM 121423 05:48:50.4 +19:55:32 8.8 0.11 163 69990 05:48:21.3 +19:55:24 16.8 163 Positions are for J2000
Event circumstances last updated at 2018/12/04 05:12:51 UT
Marc W. Buie, Southwest Research Institute