Event between (54598) Bienor and star UC4-649-012438 with event index number of 85927
Geocentric closest approach at 2017/10/19 00:54:27 UTC
J2000 position of star is 03:05:19.3 +39:38:43
Equinox of date position of star is 03:06:26.9 +39:42:44
Stellar brightness R=14.8,
use SENSEUP=128
Star is 135 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=19.4
TNO is 15.1 AU from the Sun
and 14.3 AU from the Earth.
The TNO is moving 19.3
km/sec on the sky relative to the star, or,
6.7 arcsec/hr.
The 1-sigma error in the time of the event is 57 seconds.
The 1-sigma cross-track error in the shadow position is
651 km.
The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 9.9 sec chord
Diameter=77.8 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is CENTAURR
Star training set for 54598, (2017/10/19 00:54UT) Object RA Dec mag sep mel Aldebaran 04:36:56.6 +16:32:37 0.8 30.39 127 Algol 03:09:20.0 +41:01:23 2.1 1.42 133 25Rho Per 03:06:19.4 +38:54:29 3.3 0.81 135 PPM 045859 03:08:47.7 +40:09:11 8.4 0.63 134 PPM 068078 03:06:35.3 +39:43:18 9.1 0.02 135 54598 03:06:28.3 +39:42:49 14.8 134 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 54598, (2017/10/19 00:54UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 30.39 127 Algol 03:08:10.1 +40:57:20 2.1 1.42 133 25Rho Per 03:05:10.8 +38:50:23 3.3 0.81 135 PPM 045859 03:07:38.3 +40:05:08 8.4 0.63 134 PPM 068078 03:05:26.2 +39:39:12 9.1 0.02 135 54598 03:05:19.3 +39:38:43 14.8 135 Positions are for J2000
Event circumstances last updated at 2017/06/14 16:59:04 UT
Marc W. Buie, Southwest Research Institute