Event between (342842) 08YB3 and star UC4-858-012809 with event index number of 65301
Geocentric closest approach at 2017/07/28 01:29:22 UTC
J2000 position of star is 21:42:46.0 +81:35:56
Equinox of date position of star is 21:42:10.2 +81:40:44
Stellar brightness R=13.1,
use SENSEUP=32
Star is 95 degrees from the moon.
Moon is 25% illuminated.
TNO apparent brightness V=20.2
TNO is 11.0 AU from the Sun
and 11.2 AU from the Earth.
The TNO is moving 30.6
km/sec on the sky relative to the star, or,
13.6 arcsec/hr.
The 1-sigma error in the time of the event is 21 seconds.
The 1-sigma cross-track error in the shadow position is
879 km.
The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 2.7 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
Star training set for 342842, (2017/07/28 01:29UT) Object RA Dec mag sep mel PPM 000431 02:53:41.5 +89:20:18 2.0 8.21 90 PPM 003728 21:12:33.6 +81:18:14 6.1 1.16 95 PPM 003795 21:33:40.9 +81:15:15 9.3 0.53 95 PPM 003819 21:38:34.9 +81:53:52 11.0 0.25 95 342842 21:42:09.8 +81:40:47 13.1 95 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 342842, (2017/07/28 01:29UT) Object RA Dec mag sep mel PPM 000431 02:31:52.2 +89:15:50 2.0 8.21 90 PPM 003728 21:13:21.4 +81:13:52 6.1 1.16 95 PPM 003795 21:34:17.2 +81:10:32 9.3 0.53 95 PPM 003819 21:39:15.7 +81:49:05 11.0 0.25 95 342842 21:42:46.0 +81:35:56 13.1 95 Positions are for J2000
Event circumstances last updated at 2017/05/16 18:29:50 UT
Marc W. Buie, Southwest Research Institute