Event between (60558) Echeclus and star UC4-510-004030 with event index number of 106252
Geocentric closest approach at 2018/02/13 17:40:15 UTC
J2000 position of star is 02:41:09.5 +11:58:20
Equinox of date position of star is 02:42:08.5 +12:02:56
Stellar brightness R=15.7,
use SENSEUP=128
Star is 101 degrees from the moon.
Moon is 4% illuminated.
TNO apparent brightness V=18.8
TNO is 7.5 AU from the Sun
and 7.6 AU from the Earth.
The TNO is moving 18.6
km/sec on the sky relative to the star, or,
12.1 arcsec/hr.
The 1-sigma error in the time of the event is 15 seconds.
The 1-sigma cross-track error in the shadow position is
279 km.
The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 4.1 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
Star training set for 60558, (2018/02/13 17:40UT) Object RA Dec mag sep mel Aldebaran 04:36:57.8 +16:32:39 0.8 28.15 129 Menkar 03:03:13.7 +04:09:35 2.5 9.46 103 38 Ari 02:45:57.0 +12:31:15 5.4 1.04 101 PPM 118397 02:38:44.4 +12:20:50 8.2 0.88 100 PPM 118439 02:41:42.2 +11:35:28 9.0 0.47 100 PPM 118422 02:40:57.6 +11:49:51 10.9 0.36 100 60558 02:42:08.6 +12:02:57 15.7 101 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, (2018/02/13 17:40UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 28.15 129 Menkar 03:02:16.8 +04:05:22 2.5 9.46 103 38 Ari 02:44:57.7 +12:26:43 5.4 1.04 101 PPM 118397 02:37:45.3 +12:16:10 8.2 0.88 100 PPM 118439 02:40:43.3 +11:30:51 9.0 0.47 100 PPM 118422 02:39:58.7 +11:45:14 10.9 0.36 100 60558 02:41:09.5 +11:58:20 15.7 100 Positions are for J2000
Event circumstances last updated at 2018/02/05 17:12:19 UT
Marc W. Buie, Southwest Research Institute