Event between (558168) 14XQ40 and star GA0640:06544692 with event index number of 2629078
Geocentric closest approach at 2025/05/30 01:31:50 UTC
J2000 position of star is 14:39:47.2 -24:53:44
Equinox of date position of star is 14:41:03.2 -24:59:19
Stellar brightness G=14.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 117 degrees from the moon.
Moon is 12% illuminated.
TNO apparent brightness V=22.4
TNO is 22.1 AU from the Sun
and 21.1 AU from the Earth.
The TNO is moving 20.0
km/sec on the sky relative to the star, or,
4.7 arcsec/hr.
The 1-sigma error in the time of the event is 118 seconds.
The 1-sigma cross-track error in the shadow position is
1329 km.
The TNO has an absolute magnitude Hv=8.9
Diameter=98.2 km assuming a 5% albedo -- 4.9 sec chord
Diameter=40.1 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
Star training set for 558168, (2025/05/30 01:32UT) Object RA Dec mag sep mel Spica 13:26:32.1 -11:17:35 1.0 22.38 95 5The Cen 14:08:11.4 -36:29:36 2.1 13.50 113 4 Lib 14:44:42.0 -25:06:17 5.9 0.79 117 PPM 263297 14:44:38.5 -25:13:01 8.4 0.79 117 PPM 263264 14:42:58.2 -24:50:18 9.9 0.42 117 PPM 263256 14:42:32.6 -25:01:10 10.1 0.29 117 558168 14:41:15.5 -25:00:14 14.4 117 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 558168, (2025/05/30 01:32UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 22.38 95 5The Cen 14:06:40.0 -36:22:23 2.1 13.50 113 4 Lib 14:43:13.5 -24:59:52 5.9 0.79 117 PPM 263297 14:43:09.9 -25:06:37 8.4 0.79 117 PPM 263264 14:41:29.9 -24:43:51 9.9 0.42 117 PPM 263256 14:41:04.2 -24:54:42 10.1 0.29 117 558168 14:39:47.2 -24:53:44 14.4 116 Positions are for J2000
Event circumstances last updated at 2021/11/10 00:04:31 UT
Marc W. Buie, Southwest Research Institute