Event between (530839) 11UK411 and star GA1040:00322932 with event index number of 1599065
Geocentric closest approach at 2021/07/19 12:05:43 UTC
J2000 position of star is 03:19:11.9 +15:44:08
Equinox of date position of star is 03:20:22.6 +15:48:39
Stellar brightness G=15.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 177 degrees from the moon.
Moon is 73% illuminated.
TNO apparent brightness V=22.3
TNO is 32.8 AU from the Sun
and 33.2 AU from the Earth.
The TNO is moving 17.9
km/sec on the sky relative to the star, or,
2.7 arcsec/hr.
The 1-sigma error in the time of the event is 99 seconds.
The 1-sigma cross-track error in the shadow position is
1289 km.
The TNO has an absolute magnitude Hv=6.9
Diameter=251.2 km assuming a 5% albedo -- 14.0 sec chord
Diameter=102.6 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is 5:3EE
Star training set for 530839, (2021/07/19 12:05UT) Object RA Dec mag sep mel Aldebaran 04:37:09.6 +16:33:03 0.8 18.44 164 Menkar 03:03:24.5 +04:10:23 2.5 12.37 165 PPM 119093 03:28:30.1 +12:48:33 6.5 3.59 175 PPM 118986 03:19:39.4 +15:15:11 8.4 0.59 176 PPM 119007 03:21:15.0 +15:44:05 8.8 0.22 177 PPM 118994 03:20:23.6 +15:40:05 11.7 0.14 177 530839 03:20:24.4 +15:48:46 15.8 177 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 530839, (2021/07/19 12:05UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 18.44 164 Menkar 03:02:16.8 +04:05:21 2.5 12.37 165 PPM 119093 03:27:18.7 +12:44:07 6.5 3.59 175 PPM 118986 03:18:27.2 +15:10:32 8.4 0.59 176 PPM 119007 03:20:02.5 +15:39:28 8.8 0.22 177 PPM 118994 03:19:11.2 +15:35:27 11.7 0.14 177 530839 03:19:11.9 +15:44:08 15.8 177 Positions are for J2000
Event circumstances last updated at 2020/12/30 19:59:28 UT
Marc W. Buie, Southwest Research Institute