Event between (24978) 98HJ151 and star UC4-332-085544 with event index number of 155134
Geocentric closest approach at 2018/09/29 06:47:42 UTC
J2000 position of star is 16:57:13.5 -23:43:15
Equinox of date position of star is 16:58:20.4 -23:44:54
Stellar brightness R=16.5,
use SENSEUP=128
Star is 160 degrees from the moon.
Moon is 82% illuminated.
TNO apparent brightness V=24.0
TNO is 42.9 AU from the Sun
and 43.2 AU from the Earth.
The TNO is moving 15.3
km/sec on the sky relative to the star, or,
1.8 arcsec/hr.
The 1-sigma error in the time of the event is 1948 seconds.
The 1-sigma cross-track error in the shadow position is
5349 km.
The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 12.5 sec chord
Diameter=77.8 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is CLASSICAL
Star training set for 24978, (2018/09/29 06:48UT) Object RA Dec mag sep mel Antares 16:30:33.6 -26:28:19 0.9 6.86 164 23Tau Sco 16:37:03.2 -28:15:12 2.8 6.57 161 26 Oph 17:01:18.5 -25:00:58 5.8 1.43 159 PPM 266216 16:59:55.5 -24:00:51 8.5 0.45 159 PPM 266175 16:58:05.0 -23:36:15 9.5 0.16 160 24978 16:58:21.7 -23:44:55 16.5 160 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 24978, (2018/09/29 06:48UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 6.86 164 23Tau Sco 16:35:53.0 -28:12:58 2.8 6.57 161 26 Oph 17:00:09.6 -24:59:22 5.8 1.43 159 PPM 266216 16:58:47.2 -23:59:13 8.5 0.45 159 PPM 266175 16:56:56.9 -23:34:34 9.5 0.16 160 24978 16:57:13.5 -23:43:15 16.5 160 Positions are for J2000
Event circumstances last updated at 2018/05/24 01:51:06 UT
Marc W. Buie, Southwest Research Institute