Event between (143685) 03SS317 and star GA1020:00325794 with event index number of 2468376
Geocentric closest approach at 2025/11/16 17:00:51 UTC
J2000 position of star is 03:30:32.2 +13:46:52
Equinox of date position of star is 03:31:48.4 +13:51:29
Stellar brightness G=15.6,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 141 degrees from the moon.
Moon is 11% illuminated.
TNO apparent brightness V=22.8
TNO is 29.1 AU from the Sun
and 28.1 AU from the Earth.
The TNO is moving 24.1
km/sec on the sky relative to the star, or,
4.3 arcsec/hr.
The 1-sigma error in the time of the event is 93 seconds.
The 1-sigma cross-track error in the shadow position is
1328 km.
The TNO has an absolute magnitude Hv=8.2
Diameter=166.0 km assuming a 5% albedo -- 5.8 sec chord
Diameter=67.8 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is 4:3E
Star training set for 143685, (2025/11/16 17:01UT) Object RA Dec mag sep mel Aldebaran 04:37:24.5 +16:33:34 0.8 16.01 125 Menkar 03:03:38.1 +04:11:23 2.5 11.94 148 5 Tau 03:32:18.3 +13:01:25 4.1 0.85 141 PPM 119173 03:34:47.6 +13:52:05 8.2 0.68 141 PPM 119145 03:32:35.7 +13:39:42 8.6 0.26 141 143685 03:31:58.5 +13:52:05 15.6 141 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 143685, (2025/11/16 17:01UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 16.01 125 Menkar 03:02:16.8 +04:05:21 2.5 11.94 148 5 Tau 03:30:52.4 +12:56:12 4.1 0.85 141 PPM 119173 03:33:21.2 +13:46:56 8.2 0.68 141 PPM 119145 03:31:09.5 +13:34:30 8.6 0.26 141 143685 03:30:32.2 +13:46:52 15.6 141 Positions are for J2000
Event circumstances last updated at 2022/10/29 01:38:27 UT
Marc W. Buie, Southwest Research Institute