Event between 12YF12 and star GA0880:01227485 with event index number of 2036723
Geocentric closest approach at 2022/12/01 01:41:10 UTC
J2000 position of star is 06:22:12.0 -01:38:43
Equinox of date position of star is 06:23:18.7 -01:39:26
Stellar brightness G=16.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 107 degrees from the moon.
Moon is 55% illuminated.
TNO apparent brightness V=22.2
TNO is 41.1 AU from the Sun
and 40.3 AU from the Earth.
The TNO is moving 22.8
km/sec on the sky relative to the star, or,
2.8 arcsec/hr.
The 1-sigma error in the time of the event is 181 seconds.
The 1-sigma cross-track error in the shadow position is
2143 km.
The TNO has an absolute magnitude Hv=6.0
Diameter=375.0 km assuming a 5% albedo -- 16.5 sec chord
Diameter=153.1 km assuming a 30% albedo -- 6.7 sec chord
Dynamical classification is SCATEXTD
Star training set for 12YF12, (2022/12/01 01:35UT) Object RA Dec mag sep mel Betelgeuse 05:56:24.8 +07:24:34 0.4 11.29 102 Saiph 05:48:50.7 -09:39:47 2.1 11.73 97 PPM 176254 06:26:26.8 -00:57:42 6.5 1.04 108 PPM 176223 06:22:30.1 -01:13:59 7.5 0.48 107 PPM 176233 06:23:30.9 -01:43:02 8.7 0.07 107 12YF12 06:23:21.6 -01:39:28 16.8 108 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 12YF12, (2022/12/01 01:35UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 11.29 102 Saiph 05:47:45.4 -09:40:11 2.1 11.73 97 PPM 176254 06:25:16.9 -00:56:50 6.5 1.04 108 PPM 176223 06:21:20.3 -01:13:15 7.5 0.48 107 PPM 176233 06:22:21.4 -01:42:16 8.7 0.07 107 12YF12 06:22:12.0 -01:38:43 16.8 107 Positions are for J2000
Event circumstances last updated at 2021/12/18 01:50:48 UT
Marc W. Buie, Southwest Research Institute