Event between (307261) 02MS4 and star GA0820:11567918 with event index number of 118681
Geocentric closest approach at 2018/06/10 02:55:34 UTC
J2000 position of star is 18:43:07.1 -06:37:19
Equinox of date position of star is 18:44:06.6 -06:36:09
Stellar brightness G=14.8,
use SENSEUP=128
Star is 109 degrees from the moon.
Moon is 18% illuminated.
TNO apparent brightness V=20.3
TNO is 46.7 AU from the Sun
and 45.8 AU from the Earth.
The TNO is moving 23.3
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 195 seconds.
The 1-sigma cross-track error in the shadow position is
1888 km.
The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 49.2 sec chord
Diameter=468.7 km assuming a 30% albedo -- 20.1 sec chord
Dynamical classification is SCATEXTD
Star training set for 307261, (2018/06/10 02:56UT) Object RA Dec mag sep mel Antares 16:30:32.5 -26:28:17 0.9 37.47 138 60Bet Oph 17:44:23.1 +04:33:39 2.8 18.62 122 PPM 202054 18:43:35.8 -07:03:17 6.5 0.47 109 PPM 202094 18:45:40.3 -06:30:58 6.8 0.40 108 PPM 202064 18:44:09.8 -06:49:07 9.1 0.22 109 307261 18:44:06.6 -06:36:09 14.8 109 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 307261, (2018/06/10 02:56UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 37.47 138 60Bet Oph 17:43:28.3 +04:34:05 2.8 18.62 122 PPM 202054 18:42:36.1 -07:04:26 6.5 0.47 109 PPM 202094 18:44:40.9 -06:32:10 6.8 0.40 108 PPM 202064 18:43:10.2 -06:50:17 9.1 0.22 109 307261 18:43:07.1 -06:37:19 14.8 109 Positions are for J2000
Event circumstances last updated at 2018/06/05 16:07:00 UT
Marc W. Buie, Southwest Research Institute