Event between (523757) 14WH509 and star GA1200:03258940 with event index number of 2294785
Geocentric closest approach at 2021/12/06 14:31:25 UTC
J2000 position of star is 09:08:48.4 +31:53:59
Equinox of date position of star is 09:10:08.1 +31:48:36
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 155 degrees from the moon.
Moon is 8% illuminated.
TNO apparent brightness V=21.6
TNO is 43.0 AU from the Sun
and 42.5 AU from the Earth.
The TNO is moving 14.7
km/sec on the sky relative to the star, or,
1.7 arcsec/hr.
The 1-sigma error in the time of the event is 113 seconds.
The 1-sigma cross-track error in the shadow position is
1890 km.
The TNO has an absolute magnitude Hv=5.2
Diameter=544.5 km assuming a 5% albedo -- 37.1 sec chord
Diameter=222.3 km assuming a 30% albedo -- 15.1 sec chord
Dynamical classification is SCATEXTD
Star training set for 523757, (2021/12/06 14:32UT) Object RA Dec mag sep mel Pollux 07:46:39.3 +27:58:17 1.1 18.47 173 66 Cnc 09:02:44.5 +32:09:55 5.9 1.61 156 PPM 074265 09:09:24.2 +32:27:02 6.8 0.66 155 PPM 074289 09:11:08.2 +32:02:17 9.5 0.31 154 523757 09:10:08.2 +31:48:35 16.0 154 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 523757, (2021/12/06 14:32UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 18.47 173 66 Cnc 09:01:24.1 +32:15:09 5.9 1.61 156 PPM 074265 09:08:04.1 +32:32:25 6.8 0.66 155 PPM 074289 09:09:48.4 +32:07:41 9.5 0.31 154 523757 09:08:48.4 +31:53:59 16.0 155 Positions are for J2000
Event circumstances last updated at 2021/11/26 00:02:00 UT
Marc W. Buie, Southwest Research Institute