Event between (31824) Elatus and star UC4-462-049305 with event index number of 109996
Geocentric closest approach at 2018/03/25 18:11:55 UTC
J2000 position of star is 12:33:47.4 +02:20:59
Equinox of date position of star is 12:34:42.9 +02:15:01
Stellar brightness R=12.9,
use SENSEUP=32
Star is 78 degrees from the moon.
Moon is 63% illuminated.
TNO apparent brightness V=22.1
TNO is 16.3 AU from the Sun
and 15.3 AU from the Earth.
The TNO is moving 24.0
km/sec on the sky relative to the star, or,
7.8 arcsec/hr.
The 1-sigma error in the time of the event is 413 seconds.
The 1-sigma cross-track error in the shadow position is
5846 km.
The TNO has an absolute magnitude Hv=10.1
Diameter=57.5 km assuming a 5% albedo -- 2.4 sec chord
Diameter=23.5 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
Star training set for 31824, (2018/03/25 18:12UT) Object RA Dec mag sep mel Spica 13:26:09.4 -11:15:21 1.0 18.60 94 Vindemiatrix 13:03:05.1 +10:51:41 2.8 11.12 81 35 Vir 12:48:47.2 +03:28:24 6.4 3.72 80 PPM 158984 12:36:11.7 +02:09:39 7.6 0.38 78 PPM 158967 12:35:14.9 +02:20:38 10.0 0.16 78 PPM 158952 12:34:23.5 +02:16:14 11.1 0.09 77 31824 12:34:43.3 +02:14:58 12.9 78 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 31824, (2018/03/25 18:12UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 18.60 94 Vindemiatrix 13:02:10.3 +10:57:33 2.8 11.12 81 35 Vir 12:47:51.4 +03:34:22 6.4 3.72 80 PPM 158984 12:35:15.8 +02:15:40 7.6 0.38 78 PPM 158967 12:34:19.0 +02:26:39 10.0 0.16 78 PPM 158952 12:33:27.5 +02:22:16 11.1 0.09 77 31824 12:33:47.4 +02:20:59 12.9 77 Positions are for J2000
Event circumstances last updated at 2018/02/04 17:10:52 UT
Marc W. Buie, Southwest Research Institute