Event between (542889) 13MY11 and star GA0720:33678121 with event index number of 2257345
Geocentric closest approach at 2025/01/04 14:47:28 UTC
J2000 position of star is 23:40:20.5 -16:53:40
Equinox of date position of star is 23:41:28.4 -16:46:24
Stellar brightness G=10.5,
use SENSEUP=4 with the MallinCam and and exposure
time of 125 milli-seconds with the QHY174 camera.
Star is 13 degrees from the moon.
Moon is 24% illuminated.
TNO apparent brightness V=22.9
TNO is 25.8 AU from the Sun
and 26.2 AU from the Earth.
The TNO is moving 20.7
km/sec on the sky relative to the star, or,
3.9 arcsec/hr.
The 1-sigma error in the time of the event is 84 seconds.
The 1-sigma cross-track error in the shadow position is
1759 km.
The TNO has an absolute magnitude Hv=8.5
Diameter=120.2 km assuming a 5% albedo -- 5.8 sec chord
Diameter=49.1 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
Star training set for 542889, (2025/01/04 14:47UT) Object RA Dec mag sep mel Fomalhaut 22:59:01.5 -29:29:20 1.2 16.05 22 Diphda 00:44:50.6 -17:50:59 2.0 15.12 27 104 Aqr 23:43:03.6 -17:40:40 4.7 0.98 14 PPM 241856 23:36:46.0 -16:26:43 7.9 1.21 12 PPM 241943 23:41:38.2 -16:45:21 10.0 0.00 13 542889 23:41:38.2 -16:45:21 10.5 13 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 542889, (2025/01/04 14:47UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.6 -29:37:24 1.2 16.05 22 Diphda 00:43:35.7 -17:59:11 2.0 15.12 27 104 Aqr 23:41:45.8 -17:49:00 4.7 0.98 14 PPM 241856 23:35:28.1 -16:35:01 7.9 1.21 12 PPM 241943 23:40:20.5 -16:53:41 10.0 0.00 13 542889 23:40:20.5 -16:53:40 10.5 13 Positions are for J2000
Event circumstances last updated at 2021/11/04 22:57:04 UT
Marc W. Buie, Southwest Research Institute