Event between (538691) 16FW59 and star GA0780:04264761 with event index number of 2397551
Geocentric closest approach at 2023/02/19 20:26:45 UTC
J2000 position of star is 12:39:39.0 -11:10:14
Equinox of date position of star is 12:40:50.8 -11:17:48
Stellar brightness G=14.4,
use SENSEUP=64 with the MallinCam and and exposure
time of 1 seconds with the QHY174 camera.
Star is 130 degrees from the moon.
Moon is 0% illuminated.
Apparent brightness V=22.7
Object is 45.1 AU from the Sun
and 44.4 AU from the Earth.
Apparent velocity is 17.7
km/sec on the sky relative to the star, or,
2.0 arcsec/hr.
The 1-sigma error in the time of the event is 272 seconds.
The 1-sigma cross-track error in the shadow position is
2608 km.
The object has an absolute magnitude Hv=6.1
Diameter=359.8 km assuming a 5% albedo -- 20.4 sec chord
Diameter=146.9 km assuming a 30% albedo -- 8.3 sec chord
Dynamical classification is CLASSICAL
Star training set for 538691, (2023/02/19 20:21UT) Object RA Dec mag sep mel Spica 13:26:24.9 -11:16:53 1.0 11.17 120 4Gam Crv 12:17:00.0 -17:40:13 2.6 8.60 130 PPM 226198 12:42:28.1 -13:08:27 6.0 1.89 128 PPM 226121 12:39:29.5 -12:30:44 8.0 1.26 129 PPM 226155 12:40:40.7 -11:17:46 9.3 0.04 130 538691 12:40:51.2 -11:17:50 14.4 130 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 538691, (2023/02/19 20:21UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 11.17 120 4Gam Crv 12:15:48.1 -17:32:30 2.6 8.60 130 PPM 226198 12:41:15.7 -13:00:51 6.0 1.89 128 PPM 226121 12:38:17.2 -12:23:07 8.0 1.26 129 PPM 226155 12:39:28.4 -11:10:10 9.3 0.04 130 538691 12:39:39.0 -11:10:14 14.4 130 Positions are for J2000
Event circumstances last updated at 2023/01/09 03:33:28 UT
Marc W. Buie, Southwest Research Institute