Event between (470309) 07JK43 and star UC4-448-066571 with event index number of 147048
Geocentric closest approach at 2017/07/27 13:48:24 UTC
J2000 position of star is 17:05:19.2 -00:24:19
Equinox of date position of star is 17:06:10.7 -00:25:38
Stellar brightness R=16.5
Star is 76 degrees from the moon.
Moon is 21% illuminated.
TNO apparent brightness V=21.0
TNO is 24.1 AU from the Sun
and 23.5 AU from the Earth.
The TNO is moving 13.9
km/sec on the sky relative to the star, or,
2.9 arcsec/hr.
The 1-sigma error in the time of the event is 77 seconds.
The 1-sigma cross-track error in the shadow position is
971 km.
The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 17.2 sec chord
Diameter=97.9 km assuming a 30% albedo -- 7.0 sec chord
Dynamical classification is CENTAURR
Star training set for 470309, (2017/07/27 13:48UT) Object RA Dec mag sep mel Antares 16:30:29.2 -26:28:10 0.9 27.42 71 60Bet Oph 17:44:20.5 +04:33:40 2.8 10.75 85 PPM 179990 17:06:26.6 -00:54:54 5.4 0.49 76 PPM 179983 17:04:35.5 -00:10:10 7.3 0.48 76 PPM 179991 17:06:48.6 -00:14:34 9.8 0.24 76 470309 17:06:13.4 -00:25:42 16.5 76 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 470309, (2017/07/27 13:48UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:55 0.9 27.42 71 60Bet Oph 17:43:28.3 +04:34:05 2.8 10.75 85 PPM 179990 17:05:32.2 -00:53:32 5.4 0.49 76 PPM 179983 17:03:41.4 -00:08:45 7.3 0.48 76 PPM 179991 17:05:54.5 -00:13:13 9.8 0.24 76 470309 17:05:19.2 -00:24:19 16.5 76 Positions are for J2000
Event circumstances last updated at 2016/09/01 18:15:07 UT
Marc W. Buie, Southwest Research Institute