Event between (516977) 12HZ84 and star GA0700:31999556 with event index number of 266895
Geocentric closest approach at 2018/09/19 09:29:28 UTC
J2000 position of star is 19:06:10.8 -19:48:48
Equinox of date position of star is 19:07:15.9 -19:47:02
Stellar brightness G=14.9,
use SENSEUP=128
Star is 8 degrees from the moon.
Moon is 72% illuminated.
TNO apparent brightness V=25.1
TNO is 40.1 AU from the Sun
and 39.8 AU from the Earth.
The TNO is moving 4.6
km/sec on the sky relative to the star, or,
0.6 arcsec/hr.
The 1-sigma error in the time of the event is 1078 seconds.
The 1-sigma cross-track error in the shadow position is
2270 km.
The TNO has an absolute magnitude Hv=8.9
Diameter=100.0 km assuming a 5% albedo -- 21.9 sec chord
Diameter=40.8 km assuming a 30% albedo -- 8.9 sec chord
Dynamical classification is SCATNEAR
Star training set for 516977, (2018/09/19 09:29UT) Object RA Dec mag sep mel Antares 16:30:33.5 -26:28:19 0.9 36.51 43 Nunki 18:56:25.5 -26:16:19 2.0 6.95 11 PPM 235542 19:09:22.6 -19:15:34 5.9 0.72 7 PPM 235551 19:09:58.9 -19:47:02 8.4 0.63 7 PPM 235482 19:07:06.4 -19:53:20 9.2 0.11 8 516977 19:07:16.9 -19:47:01 14.9 7 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 516977, (2018/09/19 09:29UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 36.51 43 Nunki 18:55:15.9 -26:17:49 2.0 6.95 11 PPM 235542 19:08:16.7 -19:17:25 5.9 0.72 7 PPM 235551 19:08:52.7 -19:48:54 8.4 0.63 7 PPM 235482 19:06:00.2 -19:55:07 9.2 0.11 8 516977 19:06:10.8 -19:48:48 14.9 8 Positions are for J2000
Event circumstances last updated at 2018/06/05 16:26:57 UT
Marc W. Buie, Southwest Research Institute