Event between (470316) 07OC10 and star UC4-490-139844 with event index number of 146955
Geocentric closest approach at 2017/07/21 02:38:15 UTC
J2000 position of star is 21:36:28.2 +07:59:00
Equinox of date position of star is 21:37:17.7 +08:03:31
Stellar brightness R=15.8
Star is 117 degrees from the moon.
Moon is 8% illuminated.
TNO apparent brightness V=20.6
TNO is 35.9 AU from the Sun
and 35.1 AU from the Earth.
The TNO is moving 20.6
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 100 seconds.
The 1-sigma cross-track error in the shadow position is
1554 km.
The TNO has an absolute magnitude Hv=5.0
Diameter=602.6 km assuming a 5% albedo -- 29.3 sec chord
Diameter=246.0 km assuming a 30% albedo -- 12.0 sec chord
Dynamical classification is SCATNEAR
Star training set for 470316, (2017/07/21 02:38UT) Object RA Dec mag sep mel Vega 18:37:32.0 +38:48:03 0.0 50.66 121 Markab 23:05:38.2 +15:18:00 2.5 22.78 94 PPM 171790 21:29:16.7 +08:16:22 6.4 2.01 119 PPM 171991 21:37:17.2 +07:57:41 8.5 0.10 117 PPM 171990 21:37:17.0 +08:03:25 10.5 0.01 117 470316 21:37:20.3 +08:03:46 15.8 117 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 470316, (2017/07/21 02:38UT) Object RA Dec mag sep mel Vega 18:36:56.6 +38:47:06 0.0 50.66 121 Markab 23:04:45.7 +15:12:18 2.5 22.78 94 PPM 171790 21:28:24.9 +08:11:44 6.4 2.01 119 PPM 171991 21:36:25.1 +07:52:56 8.5 0.10 117 PPM 171990 21:36:25.0 +07:58:40 10.5 0.01 117 470316 21:36:28.2 +07:59:00 15.8 117 Positions are for J2000
Event circumstances last updated at 2016/09/01 18:15:00 UT
Marc W. Buie, Southwest Research Institute