Event between (471921) 13FC28 and star GA0860:04019551 with event index number of 1102657
Geocentric closest approach at 2021/05/09 02:44:05 UTC
J2000 position of star is 11:54:23.0 -03:18:27
Equinox of date position of star is 11:55:28.3 -03:25:33
Stellar brightness G=16.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 159 degrees from the moon.
Moon is 6% illuminated.
TNO apparent brightness V=22.3
TNO is 47.0 AU from the Sun
and 46.4 AU from the Earth.
The TNO is moving 16.0
km/sec on the sky relative to the star, or,
1.7 arcsec/hr.
The 1-sigma error in the time of the event is 134 seconds.
The 1-sigma cross-track error in the shadow position is
2277 km.
The TNO has an absolute magnitude Hv=5.5
Diameter=480.9 km assuming a 5% albedo -- 30.0 sec chord
Diameter=196.3 km assuming a 30% albedo -- 12.3 sec chord
Dynamical classification is SCATEXTD
Star training set for 471921, (2021/05/09 02:44UT) Object RA Dec mag sep mel Spica 13:26:19.3 -11:16:20 1.0 23.83 172 4Gam Crv 12:16:54.4 -17:39:37 2.6 15.17 159 PPM 194890 11:52:07.8 -05:27:08 5.6 2.19 158 PPM 194938 11:54:57.6 -03:53:46 7.5 0.49 159 PPM 194950 11:55:40.1 -03:32:23 9.4 0.12 159 471921 11:55:28.6 -03:25:34 16.5 159 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 471921, (2021/05/09 02:44UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 23.83 172 4Gam Crv 12:15:48.1 -17:32:30 2.6 15.17 159 PPM 194890 11:51:02.2 -05:20:00 5.6 2.19 158 PPM 194938 11:53:52.0 -03:46:38 7.5 0.49 159 PPM 194950 11:54:34.4 -03:25:15 9.4 0.12 159 471921 11:54:23.0 -03:18:27 16.5 159 Positions are for J2000
Event circumstances last updated at 2021/04/05 23:46:11 UT
Marc W. Buie, Southwest Research Institute