Event between (55637) 02UX25 and star GA0980:00321319 with event index number of 2250601
Geocentric closest approach at 2025/10/06 04:00:29 UTC
J2000 position of star is 03:40:29.6 +09:17:18
Equinox of date position of star is 03:41:48.3 +09:21:54
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 56 degrees from the moon.
Moon is 99% illuminated.
Apparent brightness V=19.9
Object is 39.6 AU from the Sun
and 38.8 AU from the Earth.
Apparent velocity is 18.3
km/sec on the sky relative to the star, or,
2.3 arcsec/hr.
The 1-sigma error in the time of the event is 100 seconds.
The 1-sigma cross-track error in the shadow position is
1443 km.
The object has an absolute magnitude Hv=3.8
Diameter=1018.6 km assuming a 5% albedo -- 56.1 sec chord
Diameter=415.9 km assuming a 30% albedo -- 22.9 sec chord
Dynamical classification is SCATEXTD
Star training set for 55637, (2025/10/06 04:00UT) Object RA Dec mag sep mel Aldebaran 04:37:24.1 +16:33:33 0.8 15.31 70 Menkar 03:03:37.8 +04:11:22 2.5 10.82 47 6 Tau 03:33:59.7 +09:27:31 5.6 1.95 54 PPM 119285 03:42:56.4 +10:09:46 8.5 0.83 57 PPM 146791 03:41:31.2 +09:45:41 8.9 0.40 56 PPM 146781 03:40:54.3 +09:25:06 10.5 0.25 56 55637 03:41:53.4 +09:22:12 16.0 57 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 55637, (2025/10/06 04:00UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 15.31 70 Menkar 03:02:16.8 +04:05:21 2.5 10.82 47 6 Tau 03:32:35.9 +09:22:23 5.6 1.95 54 PPM 119285 03:41:32.1 +10:04:54 8.5 0.83 57 PPM 146791 03:40:07.1 +09:40:46 8.9 0.40 56 PPM 146781 03:39:30.5 +09:20:11 10.5 0.25 56 55637 03:40:29.6 +09:17:18 16.0 56 Positions are for J2000
Event circumstances last updated at 2024/03/05 04:24:34 UT
Marc W. Buie, Southwest Research Institute