Event between (118378) 99HT11 and star GA0720:05576580 with event index number of 183771
Geocentric closest approach at 2019/04/06 20:21:29 UTC
J2000 position of star is 15:34:18.9 -16:17:26
Equinox of date position of star is 15:35:22.7 -16:21:09
Stellar brightness G=15.3,
use SENSEUP=128
Star is 159 degrees from the moon.
Moon is 2% illuminated.
TNO apparent brightness V=23.7
TNO is 39.9 AU from the Sun
and 39.1 AU from the Earth.
The TNO is moving 18.0
km/sec on the sky relative to the star, or,
2.3 arcsec/hr.
The 1-sigma error in the time of the event is 474 seconds.
The 1-sigma cross-track error in the shadow position is
5457 km.
The TNO has an absolute magnitude Hv=7.6
Diameter=182.0 km assuming a 5% albedo -- 10.1 sec chord
Diameter=74.3 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is 7:4EEE
Star training set for 118378, (2019/04/06 20:21UT) Object RA Dec mag sep mel Antares 16:30:35.5 -26:28:23 0.9 16.33 143 27Bet Lib 15:18:02.8 -09:27:10 2.6 8.09 164 35Zet4Lib 15:34:00.7 -16:55:01 5.6 0.65 159 PPM 230463 15:37:01.2 -16:02:03 8.2 0.50 158 PPM 230421 15:35:22.9 -16:16:48 8.6 0.07 159 118378 15:35:24.2 -16:21:14 15.3 158 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 118378, (2019/04/06 20:21UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 16.33 143 27Bet Lib 15:17:00.3 -09:22:59 2.6 8.09 164 35Zet4Lib 15:32:55.2 -16:51:11 5.6 0.65 159 PPM 230463 15:35:56.0 -15:58:17 8.2 0.50 158 PPM 230421 15:34:17.6 -16:12:59 8.6 0.07 159 118378 15:34:18.9 -16:17:26 15.3 159 Positions are for J2000
Event circumstances last updated at 2018/10/24 21:15:01 UT
Marc W. Buie, Southwest Research Institute