Event between (500884) 13JK65 and star GDR2_251.049_-18.984 with event index number of 221300
Geocentric closest approach at 2018/09/17 18:25:03 UTC
J2000 position of star is 16:44:11.8 -18:59:01
Equinox of date position of star is 16:45:16.4 -19:01:00
Stellar brightness G=16.1,
use SENSEUP=128
Star is 22 degrees from the moon.
Moon is 58% illuminated.
TNO apparent brightness V=24.5
TNO is 29.5 AU from the Sun
and 29.7 AU from the Earth.
The TNO is moving 13.2
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 730 seconds.
The 1-sigma cross-track error in the shadow position is
6295 km.
The TNO has an absolute magnitude Hv=9.6
Diameter=72.4 km assuming a 5% albedo -- 5.5 sec chord
Diameter=29.6 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is 3:2E
Star training set for 500884, (2018/09/17 18:25UT) Object RA Dec mag sep mel Antares 16:30:33.5 -26:28:19 0.9 8.19 25 35Eta Oph 17:11:27.2 -15:44:49 2.6 7.05 16 PPM 232040 16:42:59.8 -19:57:32 5.8 1.09 22 PPM 232122 16:46:36.0 -19:10:12 6.6 0.34 21 PPM 232067 16:44:23.3 -18:59:31 9.6 0.21 22 500884 16:45:17.5 -19:01:02 16.1 21 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 500884, (2018/09/17 18:25UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 8.19 25 35Eta Oph 17:10:22.7 -15:43:29 2.6 7.05 16 PPM 232040 16:41:53.7 -19:55:27 5.8 1.09 22 PPM 232122 16:45:30.2 -19:08:13 6.6 0.34 21 PPM 232067 16:43:17.7 -18:57:29 9.6 0.21 22 500884 16:44:11.8 -18:59:01 16.1 22 Positions are for J2000
Event circumstances last updated at 2018/05/24 18:02:41 UT
Marc W. Buie, Southwest Research Institute