Event between (330836) Orius and star UC4-267-172158 with event index number of 118804
Geocentric closest approach at 2018/05/11 14:44:54 UTC
J2000 position of star is 18:42:23.5 -36:39:52
Equinox of date position of star is 18:43:36.1 -36:38:45
Stellar brightness R=15.4,
use SENSEUP=128
Star is 82 degrees from the moon.
Moon is 18% illuminated.
TNO apparent brightness V=22.4
TNO is 17.3 AU from the Sun
and 16.6 AU from the Earth.
The TNO is moving 14.1
km/sec on the sky relative to the star, or,
4.2 arcsec/hr.
The 1-sigma error in the time of the event is 589 seconds.
The 1-sigma cross-track error in the shadow position is
5080 km.
The TNO has an absolute magnitude Hv=9.9
Diameter=63.1 km assuming a 5% albedo -- 4.5 sec chord
Diameter=25.8 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
Star training set for 330836, (2018/05/11 14:45UT) Object RA Dec mag sep mel Antares 16:30:32.2 -26:28:16 0.9 29.94 111 38Zet Sgr 19:03:46.7 -29:51:08 2.7 7.99 77 PPM 298089 18:45:22.4 -36:41:55 6.3 0.35 81 PPM 298046 18:42:55.1 -36:53:18 9.0 0.28 82 PPM 298039 18:42:36.2 -36:44:35 10.5 0.23 82 330836 18:43:37.9 -36:38:44 15.4 81 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 330836, (2018/05/11 14:45UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 29.94 111 38Zet Sgr 19:02:36.7 -29:52:49 2.7 7.99 77 PPM 298089 18:44:08.0 -36:43:07 6.3 0.35 81 PPM 298046 18:41:40.5 -36:54:25 9.0 0.28 82 PPM 298039 18:41:21.7 -36:45:42 10.5 0.23 82 330836 18:42:23.5 -36:39:52 15.4 82 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:31:28 UT
Marc W. Buie, Southwest Research Institute