Event between (28978) Ixion and star GA0580:27200145 with event index number of 1108558
Geocentric closest approach at 2021/08/01 14:14:15 UTC
J2000 position of star is 17:57:17.0 -30:18:44
Equinox of date position of star is 17:58:39.4 -30:18:47
Stellar brightness G=16.3,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 141 degrees from the moon.
Moon is 40% illuminated.
TNO apparent brightness V=19.6
TNO is 38.7 AU from the Sun
and 37.9 AU from the Earth.
The TNO is moving 18.0
km/sec on the sky relative to the star, or,
2.4 arcsec/hr.
The 1-sigma error in the time of the event is 306 seconds.
The 1-sigma cross-track error in the shadow position is
2368 km.
The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 63.9 sec chord
Diameter=468.7 km assuming a 30% albedo -- 26.1 sec chord
Dynamical classification is 3:2E
Star training set for 28978, (2021/08/01 14:14UT) Object RA Dec mag sep mel Antares 16:30:44.1 -26:28:41 0.9 19.68 160 34Ups Sco 17:32:14.0 -37:18:39 2.7 8.89 144 Gam1Sgr 18:06:23.9 -29:34:37 4.7 1.83 139 PPM 297028 17:57:49.3 -30:11:56 7.3 0.22 141 PPM 297040 17:58:16.0 -30:17:17 8.6 0.09 141 28978 17:58:40.2 -30:18:47 16.3 140 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, (2021/08/01 14:14UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 19.68 160 34Ups Sco 17:30:45.8 -37:17:46 2.7 8.89 144 Gam1Sgr 18:05:01.2 -29:34:48 4.7 1.83 139 PPM 297028 17:56:26.2 -30:11:51 7.3 0.22 141 PPM 297040 17:56:52.8 -30:17:12 8.6 0.09 141 28978 17:57:17.0 -30:18:44 16.3 141 Positions are for J2000
Event circumstances last updated at 2021/05/20 01:11:00 UT
Marc W. Buie, Southwest Research Institute