Event between 98WS31 and star GA1180:01644884 with event index number of 333203
Geocentric closest approach at 2019/11/03 20:46:55 UTC
J2000 position of star is 05:38:09.1 +29:44:47
Equinox of date position of star is 05:39:23.6 +29:45:23
Stellar brightness G=14.7,
use SENSEUP=128
Star is 140 degrees from the moon.
Moon is 45% illuminated.
TNO apparent brightness V=23.5
TNO is 32.7 AU from the Sun
and 32.0 AU from the Earth.
The TNO is moving 16.4
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 1190 seconds.
The 1-sigma cross-track error in the shadow position is
2711 km.
The TNO has an absolute magnitude Hv=8.3
Diameter=134.3 km assuming a 5% albedo -- 8.2 sec chord
Diameter=54.8 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is 3:2E
Star training set for 98WS31, (2019/11/03 20:47UT) Object RA Dec mag sep mel Aldebaran 04:37:03.7 +16:32:51 0.8 19.45 125 Alnath 05:27:32.9 +28:37:20 1.6 2.83 138 PPM 094619 05:40:34.1 +29:13:29 5.9 0.59 141 PPM 070669 05:40:31.5 +30:09:37 7.9 0.47 141 PPM 094623 05:40:45.9 +29:50:35 9.8 0.30 141 98WS31 05:39:25.2 +29:45:23 14.7 141 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 98WS31, (2019/11/03 20:47UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 19.45 125 Alnath 05:26:17.5 +28:36:23 1.6 2.83 138 PPM 094619 05:39:18.3 +29:12:54 5.9 0.59 141 PPM 070669 05:39:15.1 +30:09:02 7.9 0.47 141 PPM 094623 05:39:29.8 +29:50:01 9.8 0.30 141 98WS31 05:38:09.1 +29:44:47 14.7 140 Positions are for J2000
Event circumstances last updated at 2019/06/07 22:50:54 UT
Marc W. Buie, Southwest Research Institute