Event between (469509) 03HC57 and star GA0740:05203406 with event index number of 251141
Geocentric closest approach at 2020/03/27 16:55:30 UTC
J2000 position of star is 14:30:13.2 -15:05:08
Equinox of date position of star is 14:31:14.0 -15:10:00
Stellar brightness G=15.8,
use SENSEUP=128
Star is 175 degrees from the moon.
Moon is 10% illuminated.
TNO apparent brightness V=22.1
TNO is 42.4 AU from the Sun
and 41.6 AU from the Earth.
The TNO is moving 20.2
km/sec on the sky relative to the star, or,
2.4 arcsec/hr.
The 1-sigma error in the time of the event is 204 seconds.
The 1-sigma cross-track error in the shadow position is
2853 km.
The TNO has an absolute magnitude Hv=5.8
Diameter=416.9 km assuming a 5% albedo -- 20.7 sec chord
Diameter=170.2 km assuming a 30% albedo -- 8.4 sec chord
Dynamical classification is CLASSICAL
Star training set for 469509, (2020/03/27 16:56UT) Object RA Dec mag sep mel Spica 13:26:15.7 -11:15:59 1.0 16.31 159 27Bet Lib 15:18:05.9 -09:27:23 2.6 12.77 173 PPM 229046 14:38:04.7 -12:23:26 6.2 3.23 177 PPM 228892 14:31:20.6 -15:20:14 7.5 0.16 175 469509 14:31:20.0 -15:10:29 15.8 175 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 469509, (2020/03/27 16:56UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 16.31 159 27Bet Lib 15:17:00.3 -09:22:59 2.6 12.77 173 PPM 229046 14:36:58.7 -12:18:13 6.2 3.23 177 PPM 228892 14:30:13.9 -15:14:53 7.5 0.16 175 469509 14:30:13.2 -15:05:08 15.8 175 Positions are for J2000
Event circumstances last updated at 2018/06/12 19:57:29 UT
Marc W. Buie, Southwest Research Institute