Event between (55576) Amycus and star GA0660:38434952 with event index number of 2572961
Geocentric closest approach at 2023/07/23 22:48:34 UTC
J2000 position of star is 20:11:17.9 -23:57:21
Equinox of date position of star is 20:12:39.2 -23:53:13
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 111 degrees from the moon.
Moon is 31% illuminated.
TNO apparent brightness V=21.0
TNO is 23.5 AU from the Sun
and 22.5 AU from the Earth.
The TNO is moving 23.7
km/sec on the sky relative to the star, or,
5.2 arcsec/hr.
The 1-sigma error in the time of the event is 74 seconds.
The 1-sigma cross-track error in the shadow position is
1168 km.
The TNO has an absolute magnitude Hv=7.4
Diameter=219.8 km assuming a 5% albedo -- 8.3 sec chord
Diameter=89.7 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is CENTAURR
Star training set for 55576, (2023/07/23 22:49UT) Object RA Dec mag sep mel Fomalhaut 22:58:56.8 -29:29:49 1.2 37.36 141 38Zet Sgr 19:04:06.5 -29:50:40 2.7 16.40 95 PPM 270580 20:02:47.7 -22:40:15 6.0 2.58 109 PPM 270796 20:12:17.5 -23:56:54 8.4 0.11 111 55576 20:12:42.0 -23:53:04 16.0 112 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 55576, (2023/07/23 22:49UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.6 -29:37:24 1.2 37.36 141 38Zet Sgr 19:02:36.7 -29:52:49 2.7 16.40 95 PPM 270580 20:01:23.9 -22:44:15 6.0 2.58 109 PPM 270796 20:10:53.3 -24:01:10 8.4 0.11 111 55576 20:11:17.9 -23:57:21 16.0 111 Positions are for J2000
Event circumstances last updated at 2022/10/05 04:18:35 UT
Marc W. Buie, Southwest Research Institute