Event between (169071) 01FR185 and star GA0640:08572116 with event index number of 1526593
Geocentric closest approach at 2026/05/21 16:14:19 UTC
J2000 position of star is 16:47:48.0 -25:42:17
Equinox of date position of star is 16:49:10.2 -25:44:34
Stellar brightness G=16.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 126 degrees from the moon.
Moon is 31% illuminated.
TNO apparent brightness V=23.0
TNO is 31.8 AU from the Sun
and 30.8 AU from the Earth.
The TNO is moving 22.8
km/sec on the sky relative to the star, or,
3.7 arcsec/hr.
The 1-sigma error in the time of the event is 2587 seconds.
The 1-sigma cross-track error in the shadow position is
4266 km.
The TNO has an absolute magnitude Hv=8.0
Diameter=151.4 km assuming a 5% albedo -- 6.6 sec chord
Diameter=61.8 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 3:2E
Star training set for 169071, (2026/05/21 16:14UT) Object RA Dec mag sep mel Antares 16:31:01.8 -26:29:17 0.9 4.19 122 23Tau Sco 16:37:31.8 -28:16:06 2.8 3.65 124 PPM 265803 16:43:16.3 -27:51:31 6.5 2.52 125 25 Sco 16:48:28.5 -25:34:27 6.8 0.28 126 169071 16:49:25.3 -25:44:59 16.7 126 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 169071, (2026/05/21 16:14UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 4.19 122 23Tau Sco 16:35:52.9 -28:12:58 2.8 3.65 124 PPM 265803 16:41:37.6 -27:48:35 6.5 2.52 125 25 Sco 16:46:51.3 -25:31:43 6.8 0.28 126 169071 16:47:48.0 -25:42:17 16.7 126 Positions are for J2000
Event circumstances last updated at 2022/04/19 23:02:33 UT
Marc W. Buie, Southwest Research Institute