Event between (342842) 08YB3 and star UC4-763-054989 with event index number of 171434
Geocentric closest approach at 2018/12/09 21:35:58 UTC
J2000 position of star is 20:03:19.2 +62:25:00
Equinox of date position of star is 20:03:35.4 +62:28:09
Stellar brightness R=16.4,
use SENSEUP=128
Star is 84 degrees from the moon.
Moon is 6% illuminated.
TNO apparent brightness V=20.5
TNO is 12.1 AU from the Sun
and 12.1 AU from the Earth.
The TNO is moving 34.1
km/sec on the sky relative to the star, or,
14.1 arcsec/hr.
The 1-sigma error in the time of the event is 26 seconds.
The 1-sigma cross-track error in the shadow position is
784 km.
The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 2.4 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
Star training set for 342842, (2018/12/09 21:36UT) Object RA Dec mag sep mel Deneb 20:42:04.7 +45:20:56 1.3 17.99 70 Alderamin 21:19:01.8 +62:39:58 2.4 8.66 88 66 Dra 20:05:50.8 +62:03:03 5.4 0.49 84 PPM 022007 20:09:14.7 +62:07:58 6.6 0.74 84 PPM 021930 20:02:56.3 +62:27:44 9.0 0.08 84 342842 20:03:35.8 +62:28:15 16.4 85 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, (2018/12/09 21:36UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 17.99 70 Alderamin 21:18:35.2 +62:35:09 2.4 8.66 88 66 Dra 20:05:33.2 +61:59:45 5.4 0.49 84 PPM 022007 20:08:56.9 +62:04:35 6.6 0.74 84 PPM 021930 20:02:39.7 +62:24:30 9.0 0.08 84 342842 20:03:19.2 +62:25:00 16.4 84 Positions are for J2000
Event circumstances last updated at 2018/05/24 02:01:01 UT
Marc W. Buie, Southwest Research Institute