Event between (330836) Orius and star UC4-261-182256 with event index number of 204141
Geocentric closest approach at 2019/07/29 03:25:58 UTC
J2000 position of star is 18:52:45.8 -37:54:50
Equinox of date position of star is 18:54:05.2 -37:53:20
Stellar brightness R=16.5,
use SENSEUP=128
Star is 157 degrees from the moon.
Moon is 12% illuminated.
TNO apparent brightness V=22.5
TNO is 18.0 AU from the Sun
and 17.1 AU from the Earth.
The TNO is moving 19.8
km/sec on the sky relative to the star, or,
5.7 arcsec/hr.
The 1-sigma error in the time of the event is 773 seconds.
The 1-sigma cross-track error in the shadow position is
1976 km.
The TNO has an absolute magnitude Hv=9.9
Diameter=63.1 km assuming a 5% albedo -- 3.2 sec chord
Diameter=25.8 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
Star training set for 330836, (2019/07/29 03:26UT) Object RA Dec mag sep mel Antares 16:30:36.6 -26:28:26 0.9 32.20 163 38Zet Sgr 19:03:51.3 -29:51:02 2.7 8.29 160 PPM 298326 18:56:43.2 -37:21:37 6.5 0.74 157 PPM 298256 18:53:36.6 -37:55:20 7.9 0.10 157 330836 18:54:05.8 -37:53:20 16.5 157 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, (2019/07/29 03:26UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 32.20 163 38Zet Sgr 19:02:36.7 -29:52:49 2.7 8.29 160 PPM 298326 18:55:23.6 -37:23:12 6.5 0.74 157 PPM 298256 18:52:16.5 -37:56:50 7.9 0.10 157 330836 18:52:45.8 -37:54:50 16.5 157 Positions are for J2000
Event circumstances last updated at 2019/06/07 22:28:35 UT
Marc W. Buie, Southwest Research Institute