Event between (307261) 02MS4 and star GA0820:12497641 with event index number of 339830
Geocentric closest approach at 2019/07/06 01:11:51 UTC
J2000 position of star is 18:45:33.0 -06:23:57
Equinox of date position of star is 18:46:35.6 -06:22:39
Stellar brightness G=15.3,
use SENSEUP=128
Star is 130 degrees from the moon.
Moon is 14% illuminated.
TNO apparent brightness V=20.3
TNO is 46.6 AU from the Sun
and 45.6 AU from the Earth.
The TNO is moving 25.2
km/sec on the sky relative to the star, or,
2.7 arcsec/hr.
The 1-sigma error in the time of the event is 206 seconds.
The 1-sigma cross-track error in the shadow position is
1950 km.
The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 45.5 sec chord
Diameter=468.7 km assuming a 30% albedo -- 18.6 sec chord
Dynamical classification is SCATEXTD
Star training set for 307261, (2019/07/06 01:12UT) Object RA Dec mag sep mel Antares 16:30:36.4 -26:28:25 0.9 38.09 102 60Bet Oph 17:44:26.2 +04:33:38 2.8 18.98 112 PPM 202138 18:48:31.4 -05:40:58 4.6 0.84 130 PPM 202120 18:47:04.9 -06:13:48 8.2 0.19 130 PPM 202118 18:46:48.2 -06:26:00 8.6 0.08 130 307261 18:46:35.9 -06:22:39 15.3 130 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, (2019/07/06 01:12UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 38.09 102 60Bet Oph 17:43:28.3 +04:34:05 2.8 18.98 112 PPM 202138 18:47:28.9 -05:42:19 4.6 0.84 130 PPM 202120 18:46:02.1 -06:15:07 8.2 0.19 130 PPM 202118 18:45:45.3 -06:27:18 8.6 0.08 130 307261 18:45:33.0 -06:23:57 15.3 130 Positions are for J2000
Event circumstances last updated at 2019/06/07 22:22:35 UT
Marc W. Buie, Southwest Research Institute