Event between (531077) 12DB99 and star GA0820:04427621 with event index number of 2441994
Geocentric closest approach at 2022/12/28 19:47:14 UTC
J2000 position of star is 13:52:59.5 -07:56:45
Equinox of date position of star is 13:54:08.4 -08:03:09
Stellar brightness G=17.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 143 degrees from the moon.
Moon is 37% illuminated.
TNO apparent brightness V=22.7
TNO is 41.5 AU from the Sun
and 41.9 AU from the Earth.
The TNO is moving 15.8
km/sec on the sky relative to the star, or,
1.9 arcsec/hr.
The 1-sigma error in the time of the event is 223 seconds.
The 1-sigma cross-track error in the shadow position is
2635 km.
The TNO has an absolute magnitude Hv=6.3
Diameter=331.1 km assuming a 5% albedo -- 20.9 sec chord
Diameter=135.2 km assuming a 30% albedo -- 8.5 sec chord
Dynamical classification is 3:2E
Star training set for 531077, (2022/12/28 19:47UT) Object RA Dec mag sep mel Spica 13:26:24.5 -11:16:50 1.0 7.57 147 PPM 197011 13:56:10.9 -08:10:17 6.1 0.50 142 PPM 196981 13:54:11.8 -07:50:34 8.3 0.22 143 PPM 196967 13:53:33.7 -07:58:46 8.9 0.18 143 531077 13:54:12.2 -08:03:30 17.0 142 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 531077, (2022/12/28 19:47UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 7.57 147 PPM 197011 13:54:58.0 -08:03:33 6.1 0.50 142 PPM 196981 13:52:59.1 -07:43:48 8.3 0.22 143 PPM 196967 13:52:20.9 -07:52:00 8.9 0.18 143 531077 13:52:59.5 -07:56:45 17.0 142 Positions are for J2000
Event circumstances last updated at 2021/10/15 01:20:25 UT
Marc W. Buie, Southwest Research Institute