Event between 04HY78 and star GA0620:07476156 with event index number of 1076213
Geocentric closest approach at 2021/06/18 01:51:06 UTC
J2000 position of star is 15:44:28.4 -27:38:13
Equinox of date position of star is 15:45:46.3 -27:42:10
Stellar brightness G=16.1,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 65 degrees from the moon.
Moon is 49% illuminated.
TNO apparent brightness V=23.6
TNO is 32.0 AU from the Sun
and 31.1 AU from the Earth.
The TNO is moving 20.6
km/sec on the sky relative to the star, or,
3.3 arcsec/hr.
The 1-sigma error in the time of the event is 599 seconds.
The 1-sigma cross-track error in the shadow position is
5982 km.
The TNO has an absolute magnitude Hv=8.5
Diameter=121.9 km assuming a 5% albedo -- 5.9 sec chord
Diameter=49.8 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is 3:2E
Star training set for 04HY78, (2021/06/18 01:51UT) Object RA Dec mag sep mel Antares 16:30:43.6 -26:28:40 0.9 10.07 74 7Del Sco 16:01:36.4 -22:40:52 2.3 6.17 67 39Ups Lib 15:38:19.9 -28:12:16 3.6 1.72 64 PPM 264664 15:47:31.6 -28:07:38 7.0 0.57 66 PPM 264636 15:45:41.3 -27:31:24 9.4 0.18 65 04HY78 15:45:46.9 -27:42:12 16.1 66 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 04HY78, (2021/06/18 01:51UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 10.07 74 7Del Sco 16:00:20.0 -22:37:18 2.3 6.17 67 39Ups Lib 15:37:01.4 -28:08:06 3.6 1.72 64 PPM 264664 15:46:12.8 -28:03:42 7.0 0.57 66 PPM 264636 15:44:22.9 -27:27:25 9.4 0.18 65 04HY78 15:44:28.4 -27:38:13 16.1 65 Positions are for J2000
Event circumstances last updated at 2021/04/18 22:56:41 UT
Marc W. Buie, Southwest Research Institute