Event between (567122) 20PM3 and star GA1280:00238761 with event index number of 2643059
Geocentric closest approach at 2026/09/18 22:41:31 UTC
J2000 position of star is 00:59:46.8 +39:43:53
Equinox of date position of star is 01:01:07.2 +39:51:35
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 121 degrees from the moon.
Moon is 51% illuminated.
Apparent brightness V=20.2
Object is 12.2 AU from the Sun
and 11.5 AU from the Earth.
Apparent velocity is 19.4
km/sec on the sky relative to the star, or,
8.4 arcsec/hr.
The 1-sigma error in the time of the event is 50 seconds.
The 1-sigma cross-track error in the shadow position is
1078 km.
The object has an absolute magnitude Hv=9.2
Diameter=80.5 km assuming a 5% albedo -- 4.5 sec chord
Diameter=32.9 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
Star training set for 567122, (2026/09/18 22:41UT) Object RA Dec mag sep mel Deneb 20:42:20.6 +45:22:37 1.3 46.65 83 57Gam1And 02:05:33.1 +42:27:24 2.3 12.35 133 37Mu And 00:58:14.7 +38:38:37 3.9 1.36 120 PPM 065810 00:59:39.5 +39:37:08 7.3 0.40 121 PPM 065872 01:02:58.4 +39:46:30 8.9 0.34 121 PPM 065854 01:02:07.8 +39:59:35 11.2 0.20 121 567122 01:01:16.7 +39:52:29 16.0 121 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 567122, (2026/09/18 22:41UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 46.65 83 57Gam1And 02:03:54.1 +42:19:46 2.3 12.35 133 37Mu And 00:56:45.5 +38:29:58 3.9 1.36 120 PPM 065810 00:58:09.8 +39:28:30 7.3 0.40 121 PPM 065872 01:01:28.3 +39:37:54 8.9 0.34 121 PPM 065854 01:00:37.8 +39:50:58 11.2 0.20 121 567122 00:59:46.8 +39:43:53 16.0 121 Positions are for J2000
Event circumstances last updated at 2023/11/21 04:25:14 UT
Marc W. Buie, Southwest Research Institute