Event between (50000) Quaoar and star GA0740:25017920 with event index number of 2328061
Geocentric closest approach at 2028/07/20 17:36:49 UTC
J2000 position of star is 18:55:55.9 -14:37:50
Equinox of date position of star is 18:57:18.4 -14:35:52
Stellar brightness G=14.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 170 degrees from the moon.
Moon is 3% illuminated.
Apparent brightness V=18.7
Object is 42.5 AU from the Sun
and 41.6 AU from the Earth.
Apparent velocity is 23.8
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 124 seconds.
The 1-sigma cross-track error in the shadow position is
1637 km.
The object has an absolute magnitude Hv=2.4
Diameter=1905.5 km assuming a 5% albedo -- 83.1 sec chord
Diameter=777.9 km assuming a 30% albedo -- 33.9 sec chord
Dynamical classification is CLASSICAL
Star training set for 50000, (2028/07/20 17:36UT) Object RA Dec mag sep mel Antares 16:31:09.8 -26:29:34 0.9 36.12 150 Nunki 18:57:02.0 -26:15:31 2.0 11.67 177 PPM 235210 18:56:21.2 -15:33:54 4.8 1.02 171 PPM 235227 18:56:52.7 -14:39:09 7.5 0.17 170 50000 18:57:33.3 -14:35:30 14.8 170 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 50000, (2028/07/20 17:36UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 36.12 150 Nunki 18:55:15.9 -26:17:49 2.0 11.67 177 PPM 235210 18:54:43.1 -15:36:12 4.8 1.02 171 PPM 235227 18:55:15.2 -14:41:27 7.5 0.17 170 50000 18:55:55.9 -14:37:50 14.8 170 Positions are for J2000
Event circumstances last updated at 2024/03/07 04:36:19 UT
Marc W. Buie, Southwest Research Institute