Event between (531224) 12HK85 and star GA0740:05374675 with event index number of 2442089
Geocentric closest approach at 2022/05/05 16:29:25 UTC
J2000 position of star is 15:09:43.8 -15:23:51
Equinox of date position of star is 15:10:58.2 -15:28:51
Stellar brightness G=13.5,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 130 degrees from the moon.
Moon is 20% illuminated.
TNO apparent brightness V=22.7
TNO is 38.9 AU from the Sun
and 37.9 AU from the Earth.
The TNO is moving 24.0
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 124 seconds.
The 1-sigma cross-track error in the shadow position is
1814 km.
The TNO has an absolute magnitude Hv=6.8
Diameter=259.4 km assuming a 5% albedo -- 10.8 sec chord
Diameter=105.9 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is SCATNEAR
Star training set for 531224, (2022/05/05 16:29UT) Object RA Dec mag sep mel Antares 16:30:46.9 -26:28:47 0.9 21.59 151 27Bet Lib 15:18:12.7 -09:27:50 2.6 6.27 129 21Nu Lib 15:07:52.6 -16:20:32 5.2 1.14 130 PPM 229784 15:08:40.9 -15:30:06 8.1 0.55 130 PPM 229824 15:10:42.8 -15:18:32 9.4 0.18 130 531224 15:10:58.6 -15:28:53 13.5 131 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 531224, (2022/05/05 16:29UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 21.59 151 27Bet Lib 15:17:00.3 -09:22:59 2.6 6.27 129 21Nu Lib 15:06:37.6 -16:15:25 5.2 1.14 130 PPM 229784 15:07:26.1 -15:25:01 8.1 0.55 130 PPM 229824 15:09:28.1 -15:13:30 9.4 0.18 130 531224 15:09:43.8 -15:23:51 13.5 130 Positions are for J2000
Event circumstances last updated at 2022/03/16 00:54:52 UT
Marc W. Buie, Southwest Research Institute