Event between (307261) 02MS4 and star GA0820:12125383 with event index number of 339856
Geocentric closest approach at 2019/07/19 11:53:43 UTC
J2000 position of star is 18:44:34.8 -06:25:32
Equinox of date position of star is 18:45:36.3 -06:24:17
Stellar brightness G=13.3,
use SENSEUP=32
Star is 48 degrees from the moon.
Moon is 94% 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 24.3
km/sec on the sky relative to the star, or,
2.6 arcsec/hr.
The 1-sigma error in the time of the event is 207 seconds.
The 1-sigma cross-track error in the shadow position is
1933 km.
The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 47.3 sec chord
Diameter=468.7 km assuming a 30% albedo -- 19.3 sec chord
Dynamical classification is SCATEXTD
Star training set for 307261, (2019/07/19 11:54UT) Object RA Dec mag sep mel Antares 16:30:36.5 -26:28:25 0.9 37.88 75 60Bet Oph 17:44:26.3 +04:33:38 2.8 18.80 65 PPM 202054 18:43:39.4 -07:03:12 6.5 0.81 48 PPM 202094 18:45:43.9 -06:30:53 6.8 0.11 47 PPM 202101 18:45:52.6 -06:19:09 9.1 0.10 48 307261 18:45:37.8 -06:24:15 13.3 47 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, (2019/07/19 11:54UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 37.88 75 60Bet Oph 17:43:28.3 +04:34:05 2.8 18.80 65 PPM 202054 18:42:36.1 -07:04:26 6.5 0.81 48 PPM 202094 18:44:40.9 -06:32:10 6.8 0.11 47 PPM 202101 18:44:49.7 -06:20:26 9.1 0.10 48 307261 18:44:34.8 -06:25:32 13.3 48 Positions are for J2000
Event circumstances last updated at 2019/01/27 21:42:39 UT
Marc W. Buie, Southwest Research Institute