Event between (500877) 13JE64 and star GA0720:06394817 with event index number of 1169328
Geocentric closest approach at 2021/06/23 16:42:39 UTC
J2000 position of star is 16:39:55.7 -17:06:09
Equinox of date position of star is 16:41:08.6 -17:08:33
Stellar brightness G=13.2,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 9 degrees from the moon.
Moon is 98% illuminated.
TNO apparent brightness V=24.0
TNO is 37.7 AU from the Sun
and 36.8 AU from the Earth.
The TNO is moving 22.2
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 147 seconds.
The 1-sigma cross-track error in the shadow position is
1635 km.
The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 6.2 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 2:1E
Star training set for 500877, (2021/06/23 16:43UT) Object RA Dec mag sep mel Antares 16:30:43.7 -26:28:40 0.9 9.64 9 13Zet Oph 16:38:20.6 -10:36:32 2.6 6.57 14 PPM 232030 16:42:49.1 -17:46:55 5.0 0.75 8 PPM 232029 16:42:48.6 -16:58:24 8.4 0.43 8 PPM 232002 16:41:57.5 -17:21:16 9.4 0.28 8 500877 16:41:10.0 -17:08:35 13.2 8 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 500877, (2021/06/23 16:43UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 9.64 9 13Zet Oph 16:37:09.6 -10:34:01 2.6 6.57 14 PPM 232030 16:41:34.4 -17:44:32 5.0 0.75 8 PPM 232029 16:41:34.3 -16:56:01 8.4 0.43 8 PPM 232002 16:40:43.1 -17:18:51 9.4 0.28 8 500877 16:39:55.7 -17:06:09 13.2 9 Positions are for J2000
Event circumstances last updated at 2021/01/22 21:23:23 UT
Marc W. Buie, Southwest Research Institute