Event between (90482) Orcus and star GA0780:03938752 with event index number of 184644
Geocentric closest approach at 2019/04/07 21:05:22 UTC
J2000 position of star is 10:13:23.1 -10:21:09
Equinox of date position of star is 10:14:18.8 -10:26:45
Stellar brightness G=15.3,
use SENSEUP=128
Star is 109 degrees from the moon.
Moon is 7% illuminated.
TNO apparent brightness V=19.1
TNO is 48.1 AU from the Sun
and 47.3 AU from the Earth.
The TNO is moving 20.7
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 96 seconds.
The 1-sigma cross-track error in the shadow position is
1893 km.
The TNO has an absolute magnitude Hv=2.2
Diameter=2187.8 km assuming a 5% albedo -- 105.6 sec chord
Diameter=893.2 km assuming a 30% albedo -- 43.1 sec chord
Dynamical classification is 3:2E
Star training set for 90482, (2019/04/07 21:05UT) Object RA Dec mag sep mel Regulus 10:09:23.8 +11:52:20 1.3 22.35 103 Alphard 09:28:32.1 -08:44:35 2.0 11.42 98 PPM 222699 10:17:05.9 -11:18:00 5.9 1.09 110 PPM 222612 10:13:16.3 -10:25:02 8.2 0.26 109 PPM 222640 10:14:22.2 -10:29:50 9.5 0.05 109 90482 10:14:20.3 -10:26:54 15.3 109 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 90482, (2019/04/07 21:05UT) Object RA Dec mag sep mel Regulus 10:08:22.0 +11:58:02 1.3 22.35 103 Alphard 09:27:35.2 -08:39:31 2.0 11.42 98 PPM 222699 10:16:08.9 -11:12:12 5.9 1.09 110 PPM 222612 10:12:19.2 -10:19:17 8.2 0.26 109 PPM 222640 10:13:25.0 -10:24:05 9.5 0.05 109 90482 10:13:23.1 -10:21:09 15.3 109 Positions are for J2000
Event circumstances last updated at 2018/10/04 19:04:32 UT
Marc W. Buie, Southwest Research Institute