Event between (60558) Echeclus and star GA1040:03178107 with event index number of 2337599
Geocentric closest approach at 2025/12/12 03:02:33 UTC
J2000 position of star is 08:34:54.0 +15:07:28
Equinox of date position of star is 08:36:15.3 +15:02:23
Stellar brightness G=15.1,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 46 degrees from the moon.
Moon is 48% illuminated.
Apparent brightness V=20.8
Object is 13.8 AU from the Sun
and 13.1 AU from the Earth.
Apparent velocity is 14.6
km/sec on the sky relative to the star, or,
5.5 arcsec/hr.
The 1-sigma error in the time of the event is 36 seconds.
The 1-sigma cross-track error in the shadow position is
479 km.
The object has an absolute magnitude Hv=9.2
Diameter=88.3 km assuming a 5% albedo -- 6.0 sec chord
Diameter=36.1 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
Star training set for 60558, (2025/12/12 03:02UT) Object RA Dec mag sep mel Pollux 07:46:54.2 +27:57:41 1.1 17.28 60 PPM 125463 08:37:34.8 +15:13:20 6.5 0.35 46 PPM 125437 08:36:36.9 +14:44:21 9.9 0.30 46 60558 08:36:21.1 +15:02:01 15.1 46 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 60558, (2025/12/12 03:02UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 17.28 60 PPM 125463 08:36:07.7 +15:18:49 6.5 0.35 46 PPM 125437 08:35:10.0 +14:49:48 9.9 0.30 46 60558 08:34:54.0 +15:07:28 15.1 46 Positions are for J2000
Event circumstances last updated at 2024/03/19 03:40:21 UT
Marc W. Buie, Southwest Research Institute