Event between (181708) 93FW and star GA0780:04628525 with event index number of 272155
Geocentric closest approach at 2020/06/19 03:40:55 UTC
J2000 position of star is 14:48:43.1 -11:19:45
Equinox of date position of star is 14:49:48.9 -11:24:44
Stellar brightness G=16.7,
use SENSEUP=128
Star is 160 degrees from the moon.
Moon is 5% illuminated.
TNO apparent brightness V=26.3
TNO is 41.6 AU from the Sun
and 40.9 AU from the Earth.
The TNO is moving 16.2
km/sec on the sky relative to the star, or,
2.0 arcsec/hr.
The 1-sigma error in the time of the event is 761 seconds.
The 1-sigma cross-track error in the shadow position is
3410 km.
The TNO has an absolute magnitude Hv=10.0
Diameter=263.0 km assuming a 5% albedo -- 3.7 sec chord
Diameter=107.4 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CLASSICAL
Star training set for 181708, (2020/06/19 03:41UT) Object RA Dec mag sep mel Spica 13:26:16.5 -11:16:03 1.0 20.48 140 27Bet Lib 15:18:06.7 -09:27:26 2.6 7.22 165 13Xi 1Lib 14:55:29.7 -11:58:51 5.9 1.50 161 PPM 229286 14:48:12.2 -11:27:15 8.4 0.40 159 PPM 229296 14:48:56.9 -11:22:36 9.4 0.22 159 181708 14:49:49.8 -11:24:48 16.7 160 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.
Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.
Star training set for 181708, (2020/06/19 03:41UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 20.48 140 27Bet Lib 15:17:00.3 -09:22:59 2.6 7.22 165 13Xi 1Lib 14:54:22.8 -11:53:54 5.9 1.50 161 PPM 229286 14:47:05.6 -11:22:10 8.4 0.40 159 PPM 229296 14:47:50.3 -11:17:32 9.4 0.22 159 181708 14:48:43.1 -11:19:45 16.7 160 Positions are for J2000
Event circumstances last updated at 2020/03/16 21:44:21 UT
Marc W. Buie, Southwest Research Institute