Event between (531142) 12FL84 and star GA0760:05116449 with event index number of 1601026
Geocentric closest approach at 2021/04/10 17:40:41 UTC
J2000 position of star is 15:01:11.5 -13:34:27
Equinox of date position of star is 15:02:21.1 -13:39:23
Stellar brightness G=17.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 139 degrees from the moon.
Moon is 2% illuminated.
TNO apparent brightness V=22.9
TNO is 40.8 AU from the Sun
and 39.9 AU from the Earth.
The TNO is moving 21.4
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 116 seconds.
The 1-sigma cross-track error in the shadow position is
2375 km.
The TNO has an absolute magnitude Hv=6.8
Diameter=263.0 km assuming a 5% albedo -- 12.3 sec chord
Diameter=107.4 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is SCATNEAR
Star training set for 531142, (2021/04/10 17:41UT) Object RA Dec mag sep mel Spica 13:26:19.0 -11:16:18 1.0 23.56 161 27Bet Lib 15:18:09.3 -09:27:36 2.6 5.71 137 13Xi 1Lib 14:55:32.4 -11:59:02 5.9 2.36 141 PPM 229687 15:04:18.2 -12:56:24 8.1 0.86 139 PPM 229629 15:01:58.0 -13:35:45 9.5 0.11 139 531142 15:02:21.9 -13:39:26 17.0 139 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 531142, (2021/04/10 17:41UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 23.56 161 27Bet Lib 15:17:00.3 -09:22:59 2.6 5.71 137 13Xi 1Lib 14:54:22.8 -11:53:54 5.9 2.36 141 PPM 229687 15:03:08.1 -12:51:28 8.1 0.86 139 PPM 229629 15:00:47.7 -13:30:45 9.5 0.11 139 531142 15:01:11.5 -13:34:27 17.0 139 Positions are for J2000
Event circumstances last updated at 2021/01/20 20:07:49 UT
Marc W. Buie, Southwest Research Institute