Event between (120178) 03OP32 and star GA0920:18103519 with event index number of 2139175
Geocentric closest approach at 2025/06/03 18:27:13 UTC
J2000 position of star is 23:08:15.5 +02:44:46
Equinox of date position of star is 23:09:28.5 +02:52:33
Stellar brightness G=16.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 172 degrees from the moon.
Moon is 56% illuminated.
Apparent brightness V=20.5
Object is 43.0 AU from the Sun
and 43.1 AU from the Earth.
Apparent velocity is 7.6
km/sec on the sky relative to the star, or,
0.9 arcsec/hr.
The 1-sigma error in the time of the event is 242 seconds.
The 1-sigma cross-track error in the shadow position is
1944 km.
The object has an absolute magnitude Hv=4.0
Diameter=933.3 km assuming a 5% albedo -- 124.5 sec chord
Diameter=381.0 km assuming a 30% albedo -- 50.8 sec chord
Dynamical classification is SCATEXTD
Star training set for 120178, (2025/06/03 18:25UT) Object RA Dec mag sep mel Fomalhaut 22:59:02.9 -29:29:12 1.2 32.47 154 Markab 23:06:01.7 +15:20:33 2.5 12.49 160 5 Psc 23:09:59.0 +02:16:00 5.4 0.63 173 PPM 173800 23:10:40.4 +02:16:58 8.0 0.66 173 PPM 173815 23:11:29.0 +03:04:20 9.5 0.52 172 PPM 173768 23:08:45.3 +03:00:50 10.2 0.24 172 120178 23:09:33.3 +02:53:03 16.4 172 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 120178, (2025/06/03 18:25UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.6 -29:37:24 1.2 32.47 154 Markab 23:04:45.8 +15:12:18 2.5 12.49 160 5 Psc 23:08:41.1 +02:07:43 5.4 0.63 173 PPM 173800 23:09:22.5 +02:08:40 8.0 0.66 173 PPM 173815 23:10:11.2 +02:56:03 9.5 0.52 172 PPM 173768 23:07:27.5 +02:52:34 10.2 0.24 172 120178 23:08:15.5 +02:44:46 16.4 172 Positions are for J2000
Event circumstances last updated at 2023/11/18 04:55:52 UT
Marc W. Buie, Southwest Research Institute