Event between (505477) 13UM15 and star GA1000:00181987 with event index number of 2397373
Geocentric closest approach at 2026/09/15 16:12:48 UTC
J2000 position of star is 02:04:20.6 +10:39:41
Equinox of date position of star is 02:05:39.0 +10:46:40
Stellar brightness G=15.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 164 degrees from the moon.
Moon is 21% illuminated.
Apparent brightness V=23.6
Object is 45.3 AU from the Sun
and 44.5 AU from the Earth.
Apparent velocity is 18.5
km/sec on the sky relative to the star, or,
2.1 arcsec/hr.
The 1-sigma error in the time of the event is 370 seconds.
The 1-sigma cross-track error in the shadow position is
4290 km.
The object has an absolute magnitude Hv=7.0
Diameter=251.2 km assuming a 5% albedo -- 12.7 sec chord
Diameter=102.6 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is 11:6EEEEE
Star training set for 505477, (2026/09/15 16:13UT) Object RA Dec mag sep mel Aldebaran 04:37:27.4 +16:33:40 0.8 37.24 155 6Bet Ari 01:56:07.2 +20:56:15 2.6 10.41 166 PPM 117850 02:00:51.9 +12:25:24 6.1 2.03 164 PPM 117903 02:04:23.3 +11:08:46 7.5 0.49 164 PPM 117926 02:06:16.6 +10:55:55 9.3 0.19 164 505477 02:05:46.2 +10:47:18 15.4 164 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 505477, (2026/09/15 16:13UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 37.24 155 6Bet Ari 01:54:38.5 +20:48:26 2.6 10.41 166 PPM 117850 01:59:25.9 +12:17:40 6.1 2.03 164 PPM 117903 02:02:57.6 +11:01:07 7.5 0.49 164 PPM 117926 02:04:51.0 +10:48:18 9.3 0.19 164 505477 02:04:20.6 +10:39:41 15.4 164 Positions are for J2000
Event circumstances last updated at 2024/06/19 21:32:47 UT
Marc W. Buie, Southwest Research Institute