Event between (471318) 11JF31 and star UC4-350-075391 with event index number of 144901
Geocentric closest approach at 2018/05/03 19:36:39 UTC
J2000 position of star is 15:30:52.4 -20:01:23
Equinox of date position of star is 15:31:54.5 -20:05:00
Stellar brightness R=16.4,
use SENSEUP=128
Star is 32 degrees from the moon.
Moon is 86% illuminated.
TNO apparent brightness V=21.4
TNO is 42.3 AU from the Sun
and 41.3 AU from the Earth.
The TNO is moving 24.9
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 353 seconds.
The 1-sigma cross-track error in the shadow position is
4441 km.
The TNO has an absolute magnitude Hv=5.2
Diameter=549.6 km assuming a 5% albedo -- 22.1 sec chord
Diameter=224.4 km assuming a 30% albedo -- 9.0 sec chord
Dynamical classification is SCATEXTD
Star training set for 471318, (2018/05/03 19:37UT) Object RA Dec mag sep mel Antares 16:30:32.1 -26:28:16 0.9 14.88 19 7Del Sco 16:01:25.2 -22:40:21 2.3 7.34 25 PPM 230380 15:33:40.1 -19:43:54 5.5 0.54 31 PPM 264349 15:32:46.9 -20:13:35 6.6 0.24 32 PPM 230319 15:31:03.0 -19:59:50 9.6 0.22 32 471318 15:31:55.9 -20:05:05 16.4 31 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 471318, (2018/05/03 19:37UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 14.88 19 7Del Sco 16:00:20.0 -22:37:18 2.3 7.34 25 PPM 230380 15:32:36.7 -19:40:14 5.5 0.54 31 PPM 264349 15:31:43.3 -20:09:54 6.6 0.24 32 PPM 230319 15:29:59.5 -19:56:07 9.6 0.22 32 471318 15:30:52.4 -20:01:23 16.4 32 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:29:54 UT
Marc W. Buie, Southwest Research Institute