Event between (308460) 05SC278 and star GA1020:00178391 with event index number of 2185897
Geocentric closest approach at 2022/12/18 17:40:11 UTC
J2000 position of star is 01:56:32.5 +12:04:07
Equinox of date position of star is 01:57:45.7 +12:10:45
Stellar brightness G=12.3,
use SENSEUP=16 with the MallinCam and and exposure
time of 250 milli-seconds with the QHY174 camera.
Star is 173 degrees from the moon.
Moon is 27% illuminated.
TNO apparent brightness V=22.6
TNO is 33.1 AU from the Sun
and 32.6 AU from the Earth.
The TNO is moving 11.9
km/sec on the sky relative to the star, or,
1.8 arcsec/hr.
The 1-sigma error in the time of the event is 164 seconds.
The 1-sigma cross-track error in the shadow position is
1340 km.
The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 17.4 sec chord
Diameter=85.3 km assuming a 30% albedo -- 7.1 sec chord
Dynamical classification is 5:4E
Star training set for 308460, (2022/12/18 17:40UT) Object RA Dec mag sep mel Aldebaran 04:37:14.5 +16:33:13 0.8 38.81 135 6Bet Ari 01:55:54.8 +20:55:10 2.6 8.75 166 PPM 117850 02:00:39.9 +12:24:19 6.1 0.74 172 PPM 117791 01:57:17.6 +12:24:03 8.5 0.25 173 308460 01:57:46.4 +12:10:49 12.3 173 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 308460, (2022/12/18 17:40UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 38.81 135 6Bet Ari 01:54:38.5 +20:48:26 2.6 8.75 166 PPM 117850 01:59:25.9 +12:17:40 6.1 0.74 172 PPM 117791 01:56:03.7 +12:17:21 8.5 0.25 173 308460 01:56:32.5 +12:04:07 12.3 173 Positions are for J2000
Event circumstances last updated at 2022/10/02 04:11:35 UT
Marc W. Buie, Southwest Research Institute