Event between (69990) 98WU31 and star GA1080:01500061 with event index number of 352323
Geocentric closest approach at 2018/11/08 21:49:42 UTC
J2000 position of star is 05:55:53.1 +19:59:13
Equinox of date position of star is 05:57:00.1 +19:59:19
Stellar brightness G=15.8,
use SENSEUP=128
Star is 153 degrees from the moon.
Moon is 2% illuminated.
TNO apparent brightness V=23.7
TNO is 35.5 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 257 seconds.
The 1-sigma cross-track error in the shadow position is
1319 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, (2018/11/08 21:50UT) Object RA Dec mag sep mel Betelgeuse 05:56:11.6 +07:24:33 0.4 12.58 151 Alhena 06:38:48.1 +16:22:54 1.9 10.56 143 57 Ori 05:56:03.6 +19:45:06 5.6 0.32 153 PPM 121584 05:56:06.6 +19:36:24 8.4 0.44 153 PPM 121621 05:57:43.9 +19:44:37 9.1 0.30 152 PPM 095108 05:57:27.7 +20:04:59 10.5 0.14 152 69990 05:57:00.3 +19:59:19 15.8 152 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, (2018/11/08 21:50UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 12.58 151 Alhena 06:37:42.8 +16:23:57 1.9 10.56 143 57 Ori 05:54:56.6 +19:44:58 5.6 0.32 153 PPM 121584 05:54:59.6 +19:36:16 8.4 0.44 153 PPM 121621 05:56:36.9 +19:44:33 9.1 0.30 152 PPM 095108 05:56:20.5 +20:04:54 10.5 0.14 152 69990 05:55:53.1 +19:59:13 15.8 153 Positions are for J2000
Event circumstances last updated at 2018/10/24 21:06:46 UT
Marc W. Buie, Southwest Research Institute