Event between 12YG12 and star GA0980:01225466 with event index number of 1561136
Geocentric closest approach at 2020/12/18 21:24:53 UTC
J2000 position of star is 06:01:46.3 +09:16:43
Equinox of date position of star is 06:02:55.4 +09:16:38
Stellar brightness G=15.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 126 degrees from the moon.
Moon is 21% illuminated.
TNO apparent brightness V=22.1
TNO is 33.7 AU from the Sun
and 32.8 AU from the Earth.
The TNO is moving 25.6
km/sec on the sky relative to the star, or,
3.9 arcsec/hr.
The 1-sigma error in the time of the event is 47 seconds.
The 1-sigma cross-track error in the shadow position is
1189 km.
The TNO has an absolute magnitude Hv=6.8
Diameter=258.2 km assuming a 5% albedo -- 10.1 sec chord
Diameter=105.4 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is 3:2E
Star training set for 12YG12, (2020/12/18 21:25UT) Object RA Dec mag sep mel Betelgeuse 05:56:18.5 +07:24:33 0.4 2.48 124 Bellatrix 05:26:15.4 +06:22:01 1.6 9.54 116 PPM 121823 06:04:35.1 +11:40:43 6.0 2.44 127 PPM 149779 06:02:26.2 +09:04:17 8.1 0.24 126 12YG12 06:02:55.4 +09:16:38 15.0 126 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 12YG12, (2020/12/18 21:25UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 2.48 124 Bellatrix 05:25:07.8 +06:20:58 1.6 9.54 116 PPM 121823 06:03:24.8 +11:40:51 6.0 2.44 127 PPM 149779 06:01:17.3 +09:04:20 8.1 0.24 126 12YG12 06:01:46.3 +09:16:43 15.0 126 Positions are for J2000
Event circumstances last updated at 2020/12/16 21:55:30 UT
Marc W. Buie, Southwest Research Institute