Event between (523955) 98UU43 and star GA1080:01099360 with event index number of 2352541
Geocentric closest approach at 2025/09/05 23:54:13 UTC
J2000 position of star is 05:32:09.6 +18:25:21
Equinox of date position of star is 05:33:34.6 +18:26:19
Stellar brightness G=14.3,
use SENSEUP=64 with the MallinCam and and exposure
time of 1 seconds with the QHY174 camera.
Star is 122 degrees from the moon.
Moon is 96% illuminated.
Apparent brightness V=22.7
Object is 34.2 AU from the Sun
and 34.4 AU from the Earth.
Apparent velocity is 10.4
km/sec on the sky relative to the star, or,
1.5 arcsec/hr.
The 1-sigma error in the time of the event is 692 seconds.
The 1-sigma cross-track error in the shadow position is
1620 km.
The object has an absolute magnitude Hv=7.2
Diameter=199.5 km assuming a 5% albedo -- 20.7 sec chord
Diameter=81.5 km assuming a 30% albedo -- 8.4 sec chord
Dynamical classification is 4:3E
Star training set for 523955, (2025/09/05 23:54UT) Object RA Dec mag sep mel Betelgeuse 05:56:33.8 +07:24:35 0.4 12.36 125 Alnath 05:27:55.0 +28:37:37 1.6 10.27 122 120 Tau 05:35:02.0 +18:33:23 5.4 0.34 123 119 Tau 05:33:43.2 +18:36:40 6.7 0.17 122 523955 05:33:39.9 +18:26:22 14.3 123 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 523955, (2025/09/05 23:54UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 12.36 125 Alnath 05:26:17.6 +28:36:23 1.6 10.27 122 120 Tau 05:33:31.6 +18:32:25 5.4 0.34 123 119 Tau 05:32:12.8 +18:35:39 6.7 0.17 122 523955 05:32:09.6 +18:25:21 14.3 122 Positions are for J2000
Event circumstances last updated at 2024/03/03 05:54:24 UT
Marc W. Buie, Southwest Research Institute