Event between 12YG12 and star GA1000:01329282 with event index number of 2037521
Geocentric closest approach at 2022/01/27 10:45:11 UTC
J2000 position of star is 06:05:07.9 +10:23:41
Equinox of date position of star is 06:06:20.7 +10:23:30
Stellar brightness G=15.3,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 148 degrees from the moon.
Moon is 29% illuminated.
TNO apparent brightness V=22.2
TNO is 33.5 AU from the Sun
and 32.8 AU from the Earth.
The TNO is moving 20.9
km/sec on the sky relative to the star, or,
3.2 arcsec/hr.
The 1-sigma error in the time of the event is 186 seconds.
The 1-sigma cross-track error in the shadow position is
2662 km.
The TNO has an absolute magnitude Hv=6.9
Diameter=253.5 km assuming a 5% albedo -- 12.1 sec chord
Diameter=103.5 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is 3:2E
Star training set for 12YG12, (2022/01/27 10:45UT) Object RA Dec mag sep mel Betelgeuse 05:56:22.1 +07:24:34 0.4 3.87 149 Alhena 06:38:59.2 +16:22:43 1.9 9.94 142 PPM 121823 06:04:38.8 +11:40:43 6.0 1.35 149 PPM 121854 06:05:53.4 +10:30:25 7.9 0.16 148 PPM 121858 06:05:56.7 +10:20:46 9.3 0.11 148 12YG12 06:06:21.2 +10:23:30 15.3 148 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, (2022/01/27 10:45UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 3.87 149 Alhena 06:37:42.8 +16:23:57 1.9 9.94 142 PPM 121823 06:03:24.8 +11:40:51 6.0 1.35 149 PPM 121854 06:04:40.1 +10:30:35 7.9 0.16 148 PPM 121858 06:04:43.4 +10:20:56 9.3 0.11 148 12YG12 06:05:07.9 +10:23:41 15.3 148 Positions are for J2000
Event circumstances last updated at 2021/12/04 02:03:43 UT
Marc W. Buie, Southwest Research Institute