Event between (471921) 13FC28 and star UC4-432-054500 with event index number of 309794
Geocentric closest approach at 2020/02/15 01:07:40 UTC
J2000 position of star is 11:54:54.2 -03:47:05
Equinox of date position of star is 11:55:53.9 -03:53:34
Stellar brightness R=12.5,
use SENSEUP=16
Star is 45 degrees from the moon.
Moon is 60% illuminated.
TNO apparent brightness V=22.0
TNO is 47.1 AU from the Sun
and 46.3 AU from the Earth.
The TNO is moving 20.4
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 441 seconds.
The 1-sigma cross-track error in the shadow position is
3126 km.
The TNO has an absolute magnitude Hv=5.2
Diameter=549.6 km assuming a 5% albedo -- 26.9 sec chord
Diameter=224.4 km assuming a 30% albedo -- 11.0 sec chord
Dynamical classification is SCATEXTD
Star training set for 471921, (2020/02/15 01:08UT) Object RA Dec mag sep mel Spica 13:26:15.4 -11:15:57 1.0 23.55 22 4Gam Crv 12:16:50.6 -17:39:13 2.6 14.68 38 PPM 194890 11:52:04.0 -05:26:43 5.6 1.82 45 PPM 194938 11:54:53.8 -03:53:21 7.5 0.26 45 PPM 194966 11:56:25.6 -03:42:43 8.8 0.22 45 471921 11:55:56.0 -03:53:48 12.5 45 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 471921, (2020/02/15 01:08UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 23.55 22 4Gam Crv 12:15:48.2 -17:32:31 2.6 14.68 38 PPM 194890 11:51:02.2 -05:20:00 5.6 1.82 45 PPM 194938 11:53:52.0 -03:46:38 7.5 0.26 45 PPM 194966 11:55:23.7 -03:35:59 8.8 0.22 45 471921 11:54:54.2 -03:47:05 12.5 45 Positions are for J2000
Event circumstances last updated at 2019/06/07 23:16:19 UT
Marc W. Buie, Southwest Research Institute