Event between 11JY31 and star GA0700:32978556 with event index number of 1122581
Geocentric closest approach at 2021/07/31 18:34:34 UTC
J2000 position of star is 19:22:53.3 -19:46:42
Equinox of date position of star is 19:24:08.3 -19:44:10
Stellar brightness G=10.3,
use SENSEUP=4 with the MallinCam and and exposure
time of 125 milli-seconds with the QHY174 camera.
Star is 112 degrees from the moon.
Moon is 48% illuminated.
TNO apparent brightness V=25.1
TNO is 42.3 AU from the Sun
and 41.4 AU from the Earth.
The TNO is moving 23.0
km/sec on the sky relative to the star, or,
2.8 arcsec/hr.
The 1-sigma error in the time of the event is 479 seconds.
The 1-sigma cross-track error in the shadow position is
4561 km.
The TNO has an absolute magnitude Hv=8.8
Diameter=103.8 km assuming a 5% albedo -- 4.5 sec chord
Diameter=42.4 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CLASSICAL
Star training set for 11JY31, (2021/07/31 18:35UT) Object RA Dec mag sep mel Antares 16:30:44.0 -26:28:41 0.9 40.26 151 Nunki 18:56:36.1 -26:16:05 2.0 9.10 119 43 Sgr 19:18:53.7 -18:54:46 4.9 1.49 113 PPM 235880 19:22:52.9 -19:11:33 6.8 0.62 112 PPM 235917 19:24:15.3 -19:48:08 9.7 0.07 112 11JY31 19:24:09.4 -19:44:08 10.3 111 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 11JY31, (2021/07/31 18:35UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 40.26 151 Nunki 18:55:15.9 -26:17:49 2.0 9.10 119 43 Sgr 19:17:38.1 -18:57:11 4.9 1.49 113 PPM 235880 19:21:37.1 -19:14:04 6.8 0.62 112 PPM 235917 19:22:59.2 -19:50:42 9.7 0.07 112 11JY31 19:22:53.3 -19:46:42 10.3 112 Positions are for J2000
Event circumstances last updated at 2021/04/08 23:42:25 UT
Marc W. Buie, Southwest Research Institute