Event between (309139) 06XQ51 and star UC4-377-049498 with event index number of 105654
Geocentric closest approach at 2018/02/25 16:28:45 UTC
J2000 position of star is 08:24:29.4 -14:36:58
Equinox of date position of star is 08:25:19.5 -14:40:30
Stellar brightness R=14.3,
use SENSEUP=64
Star is 44 degrees from the moon.
Moon is 76% illuminated.
TNO apparent brightness V=22.4
TNO is 17.6 AU from the Sun
and 16.9 AU from the Earth.
The TNO is moving 22.2
km/sec on the sky relative to the star, or,
6.5 arcsec/hr.
The 1-sigma error in the time of the event is 409 seconds.
The 1-sigma cross-track error in the shadow position is
5965 km.
The TNO has an absolute magnitude Hv=9.8
Diameter=66.1 km assuming a 5% albedo -- 3.0 sec chord
Diameter=27.0 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
Star training set for 309139, (2018/02/25 16:29UT) Object RA Dec mag sep mel Sirius 06:45:56.9 -16:44:31 -1.5 23.99 37 15Rho Pup 08:08:19.0 -24:21:27 2.8 10.48 50 PPM 220100 08:26:46.2 -14:59:23 6.0 0.47 44 PPM 220074 08:25:31.4 -14:39:41 8.4 0.05 44 309139 08:25:20.1 -14:40:33 14.3 44 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 309139, (2018/02/25 16:29UT) Object RA Dec mag sep mel Sirius 06:45:08.2 -16:43:20 -1.5 23.99 37 15Rho Pup 08:07:32.5 -24:18:15 2.8 10.48 50 PPM 220100 08:25:55.6 -14:55:46 6.0 0.47 44 PPM 220074 08:24:40.7 -14:36:05 8.4 0.05 44 309139 08:24:29.4 -14:36:58 14.3 44 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:18:16 UT
Marc W. Buie, Southwest Research Institute