Event between (60558) Echeclus and star UC4-513-004472 with event index number of 106258
Geocentric closest approach at 2018/03/03 16:31:58 UTC
J2000 position of star is 02:47:46.1 +12:34:10
Equinox of date position of star is 02:48:45.3 +12:38:40
Stellar brightness R=14.5,
use SENSEUP=128
Star is 142 degrees from the moon.
Moon is 96% illuminated.
TNO apparent brightness V=18.9
TNO is 7.5 AU from the Sun
and 8.0 AU from the Earth.
The TNO is moving 26.4
km/sec on the sky relative to the star, or,
16.5 arcsec/hr.
The 1-sigma error in the time of the event is 11 seconds.
The 1-sigma cross-track error in the shadow position is
290 km.
The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 2.9 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
Star training set for 60558, (2018/03/03 16:32UT) Object RA Dec mag sep mel Aldebaran 04:36:57.9 +16:32:40 0.8 26.45 115 Menkar 03:03:13.9 +04:09:36 2.5 9.21 140 38 Ari 02:45:57.1 +12:31:16 5.4 0.70 142 PPM 118534 02:47:59.7 +12:31:30 8.5 0.22 142 PPM 118545 02:48:32.1 +12:38:26 11.3 0.06 142 60558 02:48:45.6 +12:38:41 14.5 141 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, (2018/03/03 16:32UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 26.45 115 Menkar 03:02:16.8 +04:05:22 2.5 9.21 140 38 Ari 02:44:57.7 +12:26:43 5.4 0.70 142 PPM 118534 02:47:00.2 +12:26:59 8.5 0.22 142 PPM 118545 02:47:32.6 +12:33:56 11.3 0.06 142 60558 02:47:46.1 +12:34:10 14.5 141 Positions are for J2000
Event circumstances last updated at 2018/02/05 17:12:25 UT
Marc W. Buie, Southwest Research Institute