Event between (550310) 12DD86 and star GA0800:04753979 with event index number of 2399887
Geocentric closest approach at 2023/01/25 09:19:32 UTC
J2000 position of star is 15:23:22.0 -08:21:40
Equinox of date position of star is 15:24:33.7 -08:26:20
Stellar brightness G=14.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 124 degrees from the moon.
Moon is 17% illuminated.
TNO apparent brightness V=22.2
TNO is 17.3 AU from the Sun
and 17.6 AU from the Earth.
The TNO is moving 17.1
km/sec on the sky relative to the star, or,
4.8 arcsec/hr.
The 1-sigma error in the time of the event is 78 seconds.
The 1-sigma cross-track error in the shadow position is
693 km.
The TNO has an absolute magnitude Hv=9.5
Diameter=74.5 km assuming a 5% albedo -- 4.4 sec chord
Diameter=30.4 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
Star training set for 550310, (2023/01/25 09:19UT) Object RA Dec mag sep mel Antares 16:30:49.5 -26:28:52 0.9 23.92 104 27Bet Lib 15:18:15.1 -09:28:00 2.6 1.87 125 31Eps Lib 15:25:27.1 -10:24:13 4.8 1.97 123 PPM 198502 15:22:54.6 -08:44:17 8.5 0.51 124 PPM 198531 15:24:10.0 -08:30:39 8.7 0.13 124 550310 15:24:36.5 -08:26:31 14.5 123 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 550310, (2023/01/25 09:19UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 23.92 104 27Bet Lib 15:17:00.3 -09:22:59 2.6 1.87 125 31Eps Lib 15:24:11.8 -10:19:23 4.8 1.97 123 PPM 198502 15:21:40.0 -08:39:24 8.5 0.51 124 PPM 198531 15:22:55.5 -08:25:48 8.7 0.13 124 550310 15:23:22.0 -08:21:40 14.5 124 Positions are for J2000
Event circumstances last updated at 2022/03/12 01:52:01 UT
Marc W. Buie, Southwest Research Institute