Event between (472235) Zhulong and star GA0740:05170505 with event index number of 2309974
Geocentric closest approach at 2023/05/23 13:58:53 UTC
J2000 position of star is 14:21:14.8 -14:55:58
Equinox of date position of star is 14:22:31.5 -15:02:20
Stellar brightness G=14.0,
use SENSEUP=64 with the MallinCam and and exposure
time of 1 seconds with the QHY174 camera.
Star is 110 degrees from the moon.
Moon is 15% illuminated.
Apparent brightness V=21.7
Object is 33.0 AU from the Sun
and 32.1 AU from the Earth.
Apparent velocity is 20.9
km/sec on the sky relative to the star, or,
3.2 arcsec/hr.
The 1-sigma error in the time of the event is 68 seconds.
The 1-sigma cross-track error in the shadow position is
1244 km.
The object has an absolute magnitude Hv=6.5
Diameter=295.1 km assuming a 5% albedo -- 14.4 sec chord
Diameter=120.5 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is 5:2EEE
Star training set for 472235, (2023/05/23 13:58UT) Object RA Dec mag sep mel Spica 13:26:25.7 -11:16:58 1.0 14.16 96 PPM 228402 14:12:07.4 -16:24:41 4.2 2.85 109 PPM 228613 14:20:21.5 -14:38:10 8.5 0.66 110 PPM 228666 14:22:46.9 -14:59:10 9.5 0.08 110 472235 14:22:31.6 -15:02:20 14.0 111 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 472235, (2023/05/23 13:58UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 14.16 96 PPM 228402 14:10:50.5 -16:18:08 4.2 2.85 109 PPM 228613 14:19:05.0 -14:31:46 8.5 0.66 110 PPM 228666 14:21:30.2 -14:52:48 9.5 0.08 110 472235 14:21:14.8 -14:55:58 14.0 110 Positions are for J2000
Event circumstances last updated at 2023/05/17 03:32:22 UT
Marc W. Buie, Southwest Research Institute