Event between (38084) 99HB12 and star UC4-416-062383 with event index number of 100801
Geocentric closest approach at 2018/01/24 17:47:41 UTC
J2000 position of star is 15:29:23.1 -06:51:35
Equinox of date position of star is 15:30:20.5 -06:55:14
Stellar brightness R=14.5,
use SENSEUP=128
Star is 160 degrees from the moon.
Moon is 48% illuminated.
TNO apparent brightness V=22.3
TNO is 32.6 AU from the Sun
and 32.8 AU from the Earth.
The TNO is moving 16.6
km/sec on the sky relative to the star, or,
2.5 arcsec/hr.
The 1-sigma error in the time of the event is 257 seconds.
The 1-sigma cross-track error in the shadow position is
1943 km.
The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 14.4 sec chord
Diameter=97.9 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is 5:2EEE
Star training set for 38084, (2018/01/24 17:48UT) Object RA Dec mag sep mel Antares 16:30:31.1 -26:28:14 0.9 24.23 141 27Bet Lib 15:17:58.9 -09:26:55 2.6 3.97 163 PPM 198488 15:22:05.0 -05:53:21 5.4 2.30 162 PPM 198655 15:31:02.8 -06:54:22 7.4 0.17 160 PPM 198647 15:30:07.7 -07:02:26 8.6 0.13 160 38084 15:30:21.0 -06:55:16 14.5 159 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 38084, (2018/01/24 17:48UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 24.23 141 27Bet Lib 15:17:00.3 -09:22:59 2.6 3.97 163 PPM 198488 15:21:07.5 -05:49:30 5.4 2.30 162 PPM 198655 15:30:04.9 -06:50:42 7.4 0.17 160 PPM 198647 15:29:09.8 -06:58:45 8.6 0.13 160 38084 15:29:23.1 -06:51:35 14.5 160 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:12:57 UT
Marc W. Buie, Southwest Research Institute