Event between (28978) Ixion and star GA0580:34803454 with event index number of 1213739
Geocentric closest approach at 2023/02/23 15:02:53 UTC
J2000 position of star is 18:17:59.2 -30:45:07
Equinox of date position of star is 18:19:28.2 -30:44:29
Stellar brightness G=15.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 106 degrees from the moon.
Moon is 15% illuminated.
Apparent brightness V=19.5
Object is 38.3 AU from the Sun
and 38.8 AU from the Earth.
Apparent velocity is 20.3
km/sec on the sky relative to the star, or,
2.6 arcsec/hr.
The 1-sigma error in the time of the event is 364 seconds.
The 1-sigma cross-track error in the shadow position is
3685 km.
The object has an absolute magnitude Hv=3.5
Diameter=1148.2 km assuming a 5% albedo -- 60.2 sec chord
Diameter=468.7 km assuming a 30% albedo -- 24.6 sec chord
Dynamical classification is 3:2E
Star training set for 28978, (2023/02/23 15:03UT) Object RA Dec mag sep mel Antares 16:30:49.8 -26:28:53 0.9 24.16 130 Nunki 18:56:41.9 -26:15:57 2.0 9.32 98 18 Sgr 18:26:30.7 -30:44:34 5.3 1.51 104 PPM 297487 18:18:00.1 -30:23:43 8.2 0.47 106 PPM 297501 18:18:49.0 -30:42:17 9.5 0.15 106 28978 18:19:28.7 -30:44:29 15.9 105 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, (2023/02/23 15:03UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 24.16 130 Nunki 18:55:15.9 -26:17:49 2.0 9.32 98 18 Sgr 18:25:01.2 -30:45:26 5.3 1.51 104 PPM 297487 18:16:30.9 -30:24:18 8.2 0.47 106 PPM 297501 18:17:19.5 -30:42:53 9.5 0.15 106 28978 18:17:59.2 -30:45:07 15.9 106 Positions are for J2000
Event circumstances last updated at 2023/01/08 03:30:36 UT
Marc W. Buie, Southwest Research Institute