Event between (612141) 99XY143 and star GA1080:02894690 with event index number of 2806212
Geocentric closest approach at 2025/09/21 05:12:05 UTC
J2000 position of star is 07:20:28.8 +18:16:50
Equinox of date position of star is 07:21:49.7 +18:14:09
Stellar brightness G=12.8,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 62 degrees from the moon.
Moon is 0% illuminated.
Apparent brightness V=22.9
Object is 45.2 AU from the Sun
and 45.6 AU from the Earth.
Apparent velocity is 14.7
km/sec on the sky relative to the star, or,
1.6 arcsec/hr.
The 1-sigma error in the time of the event is 706 seconds.
The 1-sigma cross-track error in the shadow position is
3312 km.
The object has an absolute magnitude Hv=6.2
Diameter=348.3 km assuming a 5% albedo -- 23.8 sec chord
Diameter=142.2 km assuming a 30% albedo -- 9.7 sec chord
Dynamical classification is CLASSICAL
Star training set for 612141, (2025/09/21 05:10UT) Object RA Dec mag sep mel Pollux 07:46:53.3 +27:57:43 1.1 11.29 59 Alhena 06:39:11.8 +16:22:30 1.9 10.38 72 56 Gem 07:23:27.8 +20:23:35 6.2 2.19 62 PPM 123845 07:20:28.1 +18:31:13 8.5 0.46 63 PPM 123873 07:21:53.6 +18:27:52 9.7 0.23 62 612141 07:21:58.6 +18:13:52 12.8 62 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 612141, (2025/09/21 05:10UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 11.29 59 Alhena 06:37:42.8 +16:23:56 1.9 10.38 72 56 Gem 07:21:56.8 +20:26:37 6.2 2.19 62 PPM 123845 07:18:58.1 +18:34:09 8.5 0.46 63 PPM 123873 07:20:23.7 +18:30:50 9.7 0.23 62 612141 07:20:28.8 +18:16:50 12.8 62 Positions are for J2000
Event circumstances last updated at 2023/03/04 04:08:48 UT
Marc W. Buie, Southwest Research Institute