Event between (471172) 10JC80 and star GA0640:15818325 with event index number of 2239720
Geocentric closest approach at 2026/07/09 16:11:06 UTC
J2000 position of star is 17:27:29.3 -24:57:51
Equinox of date position of star is 17:28:59.6 -24:58:58
Stellar brightness G=16.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 139 degrees from the moon.
Moon is 30% illuminated.
Apparent brightness V=21.1
Object is 31.5 AU from the Sun
and 30.6 AU from the Earth.
Apparent velocity is 20.3
km/sec on the sky relative to the star, or,
3.3 arcsec/hr.
The 1-sigma error in the time of the event is 203 seconds.
The 1-sigma cross-track error in the shadow position is
1475 km.
The object has an absolute magnitude Hv=6.1
Diameter=358.1 km assuming a 5% albedo -- 17.7 sec chord
Diameter=146.2 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is 5:2EEE
Star training set for 471172, (2026/07/09 16:11UT) Object RA Dec mag sep mel Antares 16:31:02.3 -26:29:19 0.9 13.16 152 35Eta Oph 17:11:54.1 -15:45:21 2.6 10.07 142 44 Oph 17:27:59.5 -24:11:49 4.2 0.83 139 PPM 266914 17:30:17.1 -25:31:50 7.4 0.61 139 PPM 266898 17:29:31.3 -25:09:39 9.7 0.20 139 471172 17:29:07.2 -24:59:04 16.9 139 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 471172, (2026/07/09 16:11UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 13.16 152 35Eta Oph 17:10:22.7 -15:43:29 2.6 10.07 142 44 Oph 17:26:22.2 -24:10:34 4.2 0.83 139 PPM 266914 17:28:38.8 -25:30:39 7.4 0.61 139 PPM 266898 17:27:53.2 -25:08:26 9.7 0.20 139 471172 17:27:29.3 -24:57:51 16.9 139 Positions are for J2000
Event circumstances last updated at 2024/06/19 21:31:41 UT
Marc W. Buie, Southwest Research Institute