Event between (471931) 13PH44 and star GA0740:00229784 with event index number of 2456932
Geocentric closest approach at 2025/10/22 19:34:21 UTC
J2000 position of star is 03:04:55.0 -14:48:09
Equinox of date position of star is 03:06:02.1 -14:42:40
Stellar brightness G=12.5,
use SENSEUP=16 with the MallinCam and and exposure
time of 250 milli-seconds with the QHY174 camera.
Star is 145 degrees from the moon.
Moon is 2% illuminated.
Apparent brightness V=21.8
Object is 17.2 AU from the Sun
and 16.3 AU from the Earth.
Apparent velocity is 22.9
km/sec on the sky relative to the star, or,
6.9 arcsec/hr.
The 1-sigma error in the time of the event is 41 seconds.
The 1-sigma cross-track error in the shadow position is
718 km.
The object has an absolute magnitude Hv=9.4
Diameter=80.5 km assuming a 5% albedo -- 3.5 sec chord
Diameter=32.9 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
Star training set for 471931, (2025/10/22 19:33UT) Object RA Dec mag sep mel Rigel 05:15:46.8 -08:10:25 0.1 32.40 133 68Omi Cet 02:20:39.1 -02:51:41 2.0 16.31 156 PPM 212547 03:12:28.7 -15:55:44 6.1 1.96 143 PPM 212401 03:06:17.5 -14:17:58 8.2 0.41 145 PPM 212392 03:05:54.6 -14:50:16 10.0 0.14 144 471931 03:06:07.7 -14:42:12 12.5 145 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 471931, (2025/10/22 19:33UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 32.40 133 68Omi Cet 02:19:20.8 -02:58:45 2.0 16.31 156 PPM 212547 03:11:16.7 -16:01:30 6.1 1.96 143 PPM 212401 03:05:04.5 -14:23:54 8.2 0.41 145 PPM 212392 03:04:41.8 -14:56:13 10.0 0.14 144 471931 03:04:55.0 -14:48:09 12.5 145 Positions are for J2000
Event circumstances last updated at 2023/10/24 02:43:10 UT
Marc W. Buie, Southwest Research Institute