Event between (472235) Zhulong and star GA0720:05269685 with event index number of 2310020
Geocentric closest approach at 2025/05/18 19:46:41 UTC
J2000 position of star is 14:39:51.8 -16:25:51
Equinox of date position of star is 14:41:13.2 -16:32:05
Stellar brightness G=16.3,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 85 degrees from the moon.
Moon is 68% illuminated.
Apparent brightness V=21.7
Object is 32.9 AU from the Sun
and 31.9 AU from the Earth.
Apparent velocity is 22.4
km/sec on the sky relative to the star, or,
3.5 arcsec/hr.
The 1-sigma error in the time of the event is 69 seconds.
The 1-sigma cross-track error in the shadow position is
1242 km.
The object has an absolute magnitude Hv=6.5
Diameter=295.1 km assuming a 5% albedo -- 13.4 sec chord
Diameter=120.5 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is 5:2EEE
Star training set for 472235, (2025/05/18 19:44UT) Object RA Dec mag sep mel Spica 13:26:32.0 -11:17:35 1.0 18.87 104 27Bet Lib 15:18:22.6 -09:28:30 2.6 11.47 79 5 Lib 14:47:22.0 -15:33:54 6.5 1.76 84 PPM 229101 14:41:04.3 -16:41:52 8.5 0.17 85 472235 14:41:16.3 -16:32:19 16.3 85 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, (2025/05/18 19:44UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 18.87 104 27Bet Lib 15:17:00.3 -09:22:59 2.6 11.47 79 5 Lib 14:45:57.7 -15:27:34 6.5 1.76 84 PPM 229101 14:39:39.7 -16:35:23 8.5 0.17 85 472235 14:39:51.8 -16:25:51 16.3 85 Positions are for J2000
Event circumstances last updated at 2024/06/13 03:50:04 UT
Marc W. Buie, Southwest Research Institute