Event between (523777) 14YF50 and star GA1140:03292886 with event index number of 1153965
Geocentric closest approach at 2021/06/24 02:47:05 UTC
J2000 position of star is 11:05:07.3 +25:23:31
Equinox of date position of star is 11:06:15.6 +25:16:38
Stellar brightness G=16.2,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 106 degrees from the moon.
Moon is 99% illuminated.
TNO apparent brightness V=21.1
TNO is 35.7 AU from the Sun
and 36.1 AU from the Earth.
The TNO is moving 20.2
km/sec on the sky relative to the star, or,
2.8 arcsec/hr.
The 1-sigma error in the time of the event is 81 seconds.
The 1-sigma cross-track error in the shadow position is
1632 km.
The TNO has an absolute magnitude Hv=5.4
Diameter=492.1 km assuming a 5% albedo -- 24.3 sec chord
Diameter=200.9 km assuming a 30% albedo -- 9.9 sec chord
Dynamical classification is SCATNEAR
Star training set for 523777, (2021/06/24 02:49UT) Object RA Dec mag sep mel Regulus 10:09:30.8 +11:51:41 1.3 18.97 114 68Del Leo 11:15:14.9 +20:24:21 2.6 5.29 102 67 Leo 11:09:58.0 +24:32:31 5.7 1.11 105 PPM 100904 11:08:13.9 +25:25:14 7.1 0.47 105 PPM 100855 11:04:26.2 +25:16:30 9.5 0.42 106 PPM 100880 11:06:29.2 +24:59:05 10.7 0.29 106 523777 11:06:16.6 +25:16:32 16.2 106 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 523777, (2021/06/24 02:49UT) Object RA Dec mag sep mel Regulus 10:08:22.0 +11:58:02 1.3 18.97 114 68Del Leo 11:14:06.7 +20:31:23 2.6 5.29 102 67 Leo 11:08:49.1 +24:39:31 5.7 1.11 105 PPM 100904 11:07:04.8 +25:32:13 7.1 0.47 105 PPM 100855 11:03:16.8 +25:23:28 9.5 0.42 106 PPM 100880 11:05:20.0 +25:06:03 10.7 0.29 106 523777 11:05:07.3 +25:23:31 16.2 106 Positions are for J2000
Event circumstances last updated at 2021/03/11 01:31:29 UT
Marc W. Buie, Southwest Research Institute