Event between (28978) Ixion and star GA0580:27902164 with event index number of 1108472
Geocentric closest approach at 2021/07/09 01:58:32 UTC
J2000 position of star is 17:59:17.6 -30:19:01
Equinox of date position of star is 18:00:40.1 -30:19:01
Stellar brightness G=16.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 172 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=19.5
TNO is 38.7 AU from the Sun
and 37.7 AU from the Earth.
The TNO is moving 23.6
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 237 seconds.
The 1-sigma cross-track error in the shadow position is
2516 km.
The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 48.7 sec chord
Diameter=468.7 km assuming a 30% albedo -- 19.9 sec chord
Dynamical classification is 3:2E
Star training set for 28978, (2021/07/09 01:59UT) Object RA Dec mag sep mel Antares 16:30:43.8 -26:28:40 0.9 20.11 154 34Ups Sco 17:32:13.7 -37:18:39 2.7 9.15 163 10Gam2Sgr 18:07:11.5 -30:25:18 3.0 1.41 173 PPM 297099 18:01:12.9 -30:19:22 8.3 0.12 172 28978 18:00:40.6 -30:19:01 16.5 172 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 28978, (2021/07/09 01:59UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 20.11 154 34Ups Sco 17:30:45.8 -37:17:46 2.7 9.15 163 10Gam2Sgr 18:05:48.4 -30:25:31 3.0 1.41 173 PPM 297099 17:59:50.0 -30:19:23 8.3 0.12 172 28978 17:59:17.6 -30:19:01 16.5 172 Positions are for J2000
Event circumstances last updated at 2021/05/20 01:10:50 UT
Marc W. Buie, Southwest Research Institute