Event between (385185) 93RO and star UC4-514-004311 with event index number of 85721
Geocentric closest approach at 2017/10/20 18:43:52 UTC
J2000 position of star is 02:44:32.9 +12:45:44
Equinox of date position of star is 02:45:29.6 +12:50:05
Stellar brightness R=16.5,
use SENSEUP=128
Star is 176 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=23.6
TNO is 33.0 AU from the Sun
and 32.0 AU from the Earth.
The TNO is moving 23.5
km/sec on the sky relative to the star, or,
3.6 arcsec/hr.
The 1-sigma error in the time of the event is 667 seconds.
The 1-sigma cross-track error in the shadow position is
5834 km.
The TNO has an absolute magnitude Hv=8.4
Diameter=125.9 km assuming a 5% albedo -- 5.4 sec chord
Diameter=51.4 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is 3:2E
Star training set for 385185, (2017/10/20 18:44UT) Object RA Dec mag sep mel Aldebaran 04:36:56.7 +16:32:37 0.8 27.18 149 Menkar 03:03:12.7 +04:09:31 2.5 9.72 171 38 Ari 02:45:55.9 +12:31:11 5.4 0.33 176 PPM 118469 02:43:15.9 +12:55:16 8.4 0.56 176 PPM 118500 02:45:17.6 +12:39:49 10.0 0.18 176 385185 02:45:31.3 +12:50:12 16.5 176 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 385185, (2017/10/20 18:44UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 27.18 149 Menkar 03:02:16.8 +04:05:22 2.5 9.72 171 38 Ari 02:44:57.7 +12:26:43 5.4 0.33 176 PPM 118469 02:42:17.6 +12:50:45 8.4 0.56 176 PPM 118500 02:44:19.3 +12:35:20 10.0 0.18 176 385185 02:44:32.9 +12:45:44 16.5 176 Positions are for J2000
Event circumstances last updated at 2017/04/24 16:12:40 UT
Marc W. Buie, Southwest Research Institute