Event between 12HE85 and star GA0700:33332644 with event index number of 1061072
Geocentric closest approach at 2021/03/15 23:47:49 UTC
J2000 position of star is 19:33:05.2 -19:13:13
Equinox of date position of star is 19:34:18.9 -19:10:25
Stellar brightness G=16.3,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 93 degrees from the moon.
Moon is 6% illuminated.
TNO apparent brightness V=25.2
TNO is 40.3 AU from the Sun
and 40.8 AU from the Earth.
The TNO is moving 18.8
km/sec on the sky relative to the star, or,
2.3 arcsec/hr.
The 1-sigma error in the time of the event is 593 seconds.
The 1-sigma cross-track error in the shadow position is
2635 km.
The TNO has an absolute magnitude Hv=9.0
Diameter=93.8 km assuming a 5% albedo -- 5.0 sec chord
Diameter=38.3 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is 9:5EEEE
Star training set for 12HE85, (2021/03/15 23:48UT) Object RA Dec mag sep mel Antares 16:30:42.7 -26:28:38 0.9 42.71 134 Nunki 18:56:34.7 -26:16:07 2.0 11.22 102 PPM 236251 19:38:17.1 -18:10:56 5.7 1.36 92 PPM 236121 19:32:57.0 -19:20:25 7.4 0.36 93 PPM 236153 19:34:26.7 -19:13:30 9.1 0.06 93 12HE85 19:34:19.5 -19:10:24 16.3 92 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 12HE85, (2021/03/15 23:48UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 42.71 134 Nunki 18:55:15.9 -26:17:49 2.0 11.22 102 PPM 236251 19:37:03.4 -18:13:52 5.7 1.36 92 PPM 236121 19:31:42.6 -19:23:11 7.4 0.36 93 PPM 236153 19:33:12.4 -19:16:19 9.1 0.06 93 12HE85 19:33:05.2 -19:13:13 16.3 93 Positions are for J2000
Event circumstances last updated at 2021/01/19 21:09:45 UT
Marc W. Buie, Southwest Research Institute