Event between (60558) Echeclus and star GA1080:02529959 with event index number of 2337285
Geocentric closest approach at 2023/04/26 12:52:27 UTC
J2000 position of star is 06:57:01.4 +18:56:06
Equinox of date position of star is 06:58:22.8 +18:54:10
Stellar brightness G=15.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 12 degrees from the moon.
Moon is 37% illuminated.
Apparent brightness V=20.5
Object is 12.2 AU from the Sun
and 12.5 AU from the Earth.
Apparent velocity is 18.3
km/sec on the sky relative to the star, or,
7.3 arcsec/hr.
The 1-sigma error in the time of the event is 27 seconds.
The 1-sigma cross-track error in the shadow position is
454 km.
The object has an absolute magnitude Hv=9.2
Diameter=88.3 km assuming a 5% albedo -- 4.8 sec chord
Diameter=36.1 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
Star training set for 60558, (2023/04/26 12:52UT) Object RA Dec mag sep mel Pollux 07:46:44.4 +27:58:05 1.1 14.31 3 Alhena 06:39:03.5 +16:22:39 1.9 5.25 17 PPM 123009 06:47:43.2 +18:48:41 6.5 2.53 14 PPM 123273 06:57:33.7 +18:46:05 8.1 0.24 12 PPM 123304 06:58:44.2 +19:04:38 9.9 0.19 12 60558 06:58:23.4 +18:54:09 15.8 12 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, (2023/04/26 12:52UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 14.31 3 Alhena 06:37:42.8 +16:23:57 1.9 5.25 17 PPM 123009 06:46:21.1 +18:50:16 6.5 2.53 14 PPM 123273 06:56:11.8 +18:48:00 8.1 0.24 12 PPM 123304 06:57:22.1 +19:06:36 9.9 0.19 12 60558 06:57:01.4 +18:56:06 15.8 12 Positions are for J2000
Event circumstances last updated at 2023/02/17 04:10:28 UT
Marc W. Buie, Southwest Research Institute