Event between (531040) 12CS57 and star GA1000:03417034 with event index number of 2444610
Geocentric closest approach at 2023/01/21 18:50:32 UTC
J2000 position of star is 10:12:17.4 +11:02:55
Equinox of date position of star is 10:13:28.2 +10:56:18
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 149 degrees from the moon.
Moon is 0% illuminated.
TNO apparent brightness V=22.7
TNO is 42.9 AU from the Sun
and 42.0 AU from the Earth.
The TNO is moving 21.8
km/sec on the sky relative to the star, or,
2.6 arcsec/hr.
The 1-sigma error in the time of the event is 189 seconds.
The 1-sigma cross-track error in the shadow position is
3262 km.
The TNO has an absolute magnitude Hv=6.3
Diameter=331.1 km assuming a 5% albedo -- 15.2 sec chord
Diameter=135.2 km assuming a 30% albedo -- 6.2 sec chord
Dynamical classification is SCATEXTD
Star training set for 531040, (2023/01/21 18:51UT) Object RA Dec mag sep mel Regulus 10:09:35.9 +11:51:13 1.3 1.33 150 31 Leo 10:09:07.6 +09:53:01 6.0 1.51 149 PPM 127247 10:16:23.3 +11:33:31 7.9 0.94 149 PPM 127224 10:15:03.9 +10:43:37 8.7 0.43 148 PPM 127220 10:14:45.2 +11:04:04 11.3 0.33 149 531040 10:13:31.0 +10:56:02 16.0 148 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 531040, (2023/01/21 18:51UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 1.33 150 31 Leo 10:07:54.1 +09:59:50 6.0 1.51 149 PPM 127247 10:15:09.6 +11:40:27 7.9 0.94 149 PPM 127224 10:13:50.4 +10:50:31 8.7 0.43 148 PPM 127220 10:13:31.6 +11:10:58 11.3 0.33 149 531040 10:12:17.4 +11:02:55 16.0 149 Positions are for J2000
Event circumstances last updated at 2022/03/12 01:50:54 UT
Marc W. Buie, Southwest Research Institute