Event between (50000) Quaoar and star GA0740:16544992 with event index number of 279377
Geocentric closest approach at 2020/07/19 16:51:33 UTC
J2000 position of star is 18:12:03.3 -15:16:44
Equinox of date position of star is 18:13:07.2 -15:16:23
Stellar brightness G=16.8,
use SENSEUP=128
Star is 165 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=18.7
TNO is 42.8 AU from the Sun
and 41.9 AU from the Earth.
The TNO is moving 22.2
km/sec on the sky relative to the star, or,
2.6 arcsec/hr.
The 1-sigma error in the time of the event is 115 seconds.
The 1-sigma cross-track error in the shadow position is
1532 km.
The TNO has an absolute magnitude Hv=2.4
Diameter=1995.3 km assuming a 5% albedo -- 90.1 sec chord
Diameter=814.6 km assuming a 30% albedo -- 36.8 sec chord
Dynamical classification is CLASSICAL
Star training set for 50000, (2020/07/19 16:52UT) Object RA Dec mag sep mel Antares 16:30:40.2 -26:28:33 0.9 26.37 145 35Eta Oph 17:11:33.5 -15:44:56 2.6 14.86 152 PPM 234113 18:10:53.4 -13:55:46 6.4 1.46 164 PPM 234184 18:13:39.2 -15:22:00 8.5 0.14 165 PPM 234170 18:13:16.3 -15:16:47 9.5 0.01 165 50000 18:13:14.0 -15:16:21 16.8 165 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 50000, (2020/07/19 16:52UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 26.37 145 35Eta Oph 17:10:22.7 -15:43:29 2.6 14.86 152 PPM 234113 18:09:43.4 -13:56:04 6.4 1.46 164 PPM 234184 18:12:28.5 -15:22:24 8.5 0.14 165 PPM 234170 18:12:05.6 -15:17:10 9.5 0.01 165 50000 18:12:03.3 -15:16:44 16.8 165 Positions are for J2000
Event circumstances last updated at 2018/08/01 17:57:15 UT
Marc W. Buie, Southwest Research Institute