Event between (330836) Orius and star UC4-269-137338 with event index number of 68388
Geocentric closest approach at 2017/07/17 16:00:24 UTC
J2000 position of star is 18:01:59.8 -36:12:04
Equinox of date position of star is 18:03:10.2 -36:12:00
Stellar brightness R=16.0,
use SENSEUP=128
Star is 124 degrees from the moon.
Moon is 41% illuminated.
TNO apparent brightness V=22.2
TNO is 16.8 AU from the Sun
and 15.8 AU from the Earth.
The TNO is moving 19.3
km/sec on the sky relative to the star, or,
6.0 arcsec/hr.
The 1-sigma error in the time of the event is 512 seconds.
The 1-sigma cross-track error in the shadow position is
2640 km.
The TNO has an absolute magnitude Hv=9.9
Diameter=63.1 km assuming a 5% albedo -- 3.3 sec chord
Diameter=25.8 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
Star training set for 330836, (2017/07/17 16:00UT) Object RA Dec mag sep mel Antares 16:30:29.1 -26:28:10 0.9 21.98 145 Kap Sco 17:43:42.2 -39:02:14 2.4 4.79 126 PPM 297145 18:02:59.5 -36:22:37 6.5 0.18 123 PPM 297157 18:03:28.4 -36:14:53 9.5 0.08 123 330836 18:03:10.9 -36:12:00 16.0 123 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, (2017/07/17 16:00UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 21.98 145 Kap Sco 17:42:29.3 -39:01:49 2.4 4.79 126 PPM 297145 18:01:48.3 -36:22:41 6.5 0.18 123 PPM 297157 18:02:17.3 -36:14:57 9.5 0.08 123 330836 18:01:59.8 -36:12:04 16.0 123 Positions are for J2000
Event circumstances last updated at 2017/05/16 18:29:08 UT
Marc W. Buie, Southwest Research Institute