Event between (169071) 01FR185 and star UC4-328-080335 with event index number of 356546
Geocentric closest approach at 2020/04/21 16:57:42 UTC
J2000 position of star is 15:51:53.4 -24:32:55
Equinox of date position of star is 15:53:03.2 -24:36:20
Stellar brightness R=16.2,
use SENSEUP=128
Star is 135 degrees from the moon.
Moon is 2% illuminated.
TNO apparent brightness V=23.1
TNO is 32.2 AU from the Sun
and 31.3 AU from the Earth.
The TNO is moving 19.9
km/sec on the sky relative to the star, or,
3.2 arcsec/hr.
The 1-sigma error in the time of the event is 1128 seconds.
The 1-sigma cross-track error in the shadow position is
4993 km.
The TNO has an absolute magnitude Hv=8.0
Diameter=151.4 km assuming a 5% albedo -- 7.6 sec chord
Diameter=61.8 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is 3:2E
Star training set for 169071, (2020/04/21 16:58UT) Object RA Dec mag sep mel Antares 16:30:39.3 -26:28:31 0.9 8.67 126 7Del Sco 16:01:32.3 -22:40:41 2.3 2.73 134 PPM 264828 15:55:06.9 -24:35:32 5.3 0.46 134 PPM 264863 15:56:35.7 -24:43:43 8.4 0.80 134 PPM 264813 15:54:18.3 -24:49:31 9.5 0.35 134 PPM 264784 15:52:57.4 -24:46:03 10.1 0.16 135 169071 15:53:06.4 -24:36:29 16.2 135 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 169071, (2020/04/21 16:58UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 8.67 126 7Del Sco 16:00:20.0 -22:37:18 2.3 2.73 134 PPM 264828 15:53:53.9 -24:32:00 5.3 0.46 134 PPM 264863 15:55:22.5 -24:40:13 8.4 0.80 134 PPM 264813 15:53:05.2 -24:45:58 9.5 0.35 134 PPM 264784 15:51:44.4 -24:42:28 10.1 0.16 135 169071 15:51:53.4 -24:32:55 16.2 135 Positions are for J2000
Event circumstances last updated at 2019/06/07 23:29:58 UT
Marc W. Buie, Southwest Research Institute