Event between 05GF187 and star GA0680:10503801 with event index number of 1080756
Geocentric closest approach at 2021/05/18 19:55:01 UTC
J2000 position of star is 17:18:22.7 -20:01:09
Equinox of date position of star is 17:19:38.7 -20:02:26
Stellar brightness G=14.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 123 degrees from the moon.
Moon is 40% illuminated.
TNO apparent brightness V=22.8
TNO is 29.4 AU from the Sun
and 28.5 AU from the Earth.
The TNO is moving 20.9
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 336 seconds.
The 1-sigma cross-track error in the shadow position is
1423 km.
The TNO has an absolute magnitude Hv=8.1
Diameter=144.5 km assuming a 5% albedo -- 6.9 sec chord
Diameter=59.0 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is 3:2E
Star training set for 05GF187, (2021/05/18 19:55UT) Object RA Dec mag sep mel Antares 16:30:43.3 -26:28:39 0.9 12.94 114 35Eta Oph 17:11:36.3 -15:45:00 2.6 4.70 120 40Xi Oph 17:22:17.4 -21:08:02 3.9 1.26 124 PPM 232932 17:21:17.6 -20:00:07 8.4 0.39 124 PPM 232897 17:19:47.6 -19:59:47 9.8 0.06 123 05GF187 17:19:38.7 -20:02:26 14.9 124 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 05GF187, (2021/05/18 19:55UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 12.94 114 35Eta Oph 17:10:22.7 -15:43:29 2.6 4.70 120 40Xi Oph 17:21:00.7 -21:06:51 3.9 1.26 124 PPM 232932 17:20:01.6 -19:58:54 8.4 0.39 124 PPM 232897 17:18:31.6 -19:58:31 9.8 0.06 123 05GF187 17:18:22.7 -20:01:09 14.9 123 Positions are for J2000
Event circumstances last updated at 2021/05/18 00:32:38 UT
Marc W. Buie, Southwest Research Institute