Event between (50000) Quaoar and star UC4-373-115742 with event index number of 212884
Geocentric closest approach at 2019/09/08 14:00:42 UTC
J2000 position of star is 18:04:21.9 -15:26:41
Equinox of date position of star is 18:05:25.3 -15:26:33
Stellar brightness R=15.7,
use SENSEUP=128
Star is 15 degrees from the moon.
Moon is 74% illuminated.
TNO apparent brightness V=18.9
TNO is 42.8 AU from the Sun
and 42.6 AU from the Earth.
The TNO is moving 4.9
km/sec on the sky relative to the star, or,
0.6 arcsec/hr.
The 1-sigma error in the time of the event is 541 seconds.
The 1-sigma cross-track error in the shadow position is
1643 km.
The TNO has an absolute magnitude Hv=2.4
Diameter=1995.3 km assuming a 5% albedo -- 407.9 sec chord
Diameter=814.6 km assuming a 30% albedo -- 166.5 sec chord
Dynamical classification is CLASSICAL
Star training set for 50000, (2019/09/08 14:01UT) Object RA Dec mag sep mel Antares 16:30:37.1 -26:28:26 0.9 24.68 35 35Eta Oph 17:11:30.5 -15:44:53 2.6 13.00 27 6 Sgr 18:02:31.8 -17:09:22 6.3 1.86 15 PPM 234043 18:07:41.9 -14:58:11 8.2 0.71 15 PPM 233983 18:05:37.0 -15:38:32 9.7 0.20 15 50000 18:05:29.7 -15:26:32 15.7 15 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, (2019/09/08 14:01UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 24.68 35 35Eta Oph 17:10:22.7 -15:43:29 2.6 13.00 27 6 Sgr 18:01:23.1 -17:09:25 6.3 1.86 15 PPM 234043 18:06:34.3 -14:58:23 8.2 0.71 15 PPM 233983 18:04:29.1 -15:38:40 9.7 0.20 15 50000 18:04:21.9 -15:26:41 15.7 15 Positions are for J2000
Event circumstances last updated at 2018/06/01 16:58:10 UT
Marc W. Buie, Southwest Research Institute