Event between (38628) Huya and star GA0820:05559615 with event index number of 1056133
Geocentric closest approach at 2021/02/21 02:20:34 UTC
J2000 position of star is 17:01:35.2 -07:24:15
Equinox of date position of star is 17:02:43.3 -07:26:00
Stellar brightness G=16.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 165 degrees from the moon.
Moon is 63% illuminated.
TNO apparent brightness V=19.7
TNO is 28.8 AU from the Sun
and 29.0 AU from the Earth.
The TNO is moving 15.3
km/sec on the sky relative to the star, or,
2.6 arcsec/hr.
The 1-sigma error in the time of the event is 69 seconds.
The 1-sigma cross-track error in the shadow position is
1051 km.
The TNO has an absolute magnitude Hv=4.9
Diameter=642.7 km assuming a 5% albedo -- 41.9 sec chord
Diameter=262.4 km assuming a 30% albedo -- 17.1 sec chord
Dynamical classification is 3:2E+6:4II
Star training set for 38628, (2021/02/21 02:21UT) Object RA Dec mag sep mel Antares 16:30:42.4 -26:28:38 0.9 20.51 171 13Zet Oph 16:38:19.5 -10:36:30 2.6 6.81 166 23 Oph 16:55:43.6 -06:11:13 5.3 2.14 163 PPM 200264 17:02:21.9 -07:03:27 7.5 0.39 164 PPM 200265 17:02:24.3 -07:24:18 9.5 0.09 165 38628 17:02:43.8 -07:26:00 16.9 165 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 38628, (2021/02/21 02:21UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 20.51 171 13Zet Oph 16:37:09.6 -10:34:01 2.6 6.81 166 23 Oph 16:54:35.6 -06:09:15 5.3 2.14 163 PPM 200264 17:01:13.5 -07:01:41 7.5 0.39 164 PPM 200265 17:01:15.7 -07:22:31 9.5 0.09 165 38628 17:01:35.2 -07:24:15 16.9 165 Positions are for J2000
Event circumstances last updated at 2020/12/22 00:00:59 UT
Marc W. Buie, Southwest Research Institute