Event between (307251) 02KW14 and star UC4-321-099983 with event index number of 356931
Geocentric closest approach at 2020/05/25 01:39:27 UTC
J2000 position of star is 17:05:19.1 -25:53:39
Equinox of date position of star is 17:06:31.1 -25:55:10
Stellar brightness R=16.2,
use SENSEUP=128
Star is 166 degrees from the moon.
Moon is 5% illuminated.
TNO apparent brightness V=21.9
TNO is 42.6 AU from the Sun
and 41.6 AU from the Earth.
The TNO is moving 23.9
km/sec on the sky relative to the star, or,
2.9 arcsec/hr.
The 1-sigma error in the time of the event is 360 seconds.
The 1-sigma cross-track error in the shadow position is
2936 km.
The TNO has an absolute magnitude Hv=5.6
Diameter=457.1 km assuming a 5% albedo -- 19.1 sec chord
Diameter=186.6 km assuming a 30% albedo -- 7.8 sec chord
Dynamical classification is SCATEXTD
Star training set for 307251, (2020/05/25 01:39UT) Object RA Dec mag sep mel Antares 16:30:39.7 -26:28:32 0.9 8.07 158 23Tau Sco 16:37:09.3 -28:15:24 2.8 6.95 159 PPM 266416 17:08:09.2 -26:32:20 6.3 0.71 166 PPM 266363 17:05:59.0 -25:40:22 6.9 0.28 166 PPM 266390 17:06:54.0 -25:50:34 8.7 0.11 166 307251 17:06:34.7 -25:55:15 16.2 166 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 307251, (2020/05/25 01:39UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 8.07 158 23Tau Sco 16:35:53.0 -28:12:58 2.8 6.95 159 PPM 266416 17:06:53.2 -26:30:47 6.3 0.71 166 PPM 266363 17:04:43.5 -25:38:45 6.9 0.28 166 PPM 266390 17:05:38.5 -25:48:59 8.7 0.11 166 307251 17:05:19.1 -25:53:39 16.2 166 Positions are for J2000
Event circumstances last updated at 2019/06/07 23:41:50 UT
Marc W. Buie, Southwest Research Institute