Event between (16684) 94JQ1 and star GA0640:08045412 with event index number of 1643638
Geocentric closest approach at 2025/03/30 21:50:25 UTC
J2000 position of star is 16:37:04.5 -24:45:04
Equinox of date position of star is 16:38:33.8 -24:47:56
Stellar brightness G=16.1,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 140 degrees from the moon.
Moon is 3% illuminated.
Apparent brightness V=23.1
Object is 42.1 AU from the Sun
and 41.6 AU from the Earth.
Apparent velocity is 9.4
km/sec on the sky relative to the star, or,
1.1 arcsec/hr.
The 1-sigma error in the time of the event is 1073 seconds.
The 1-sigma cross-track error in the shadow position is
5293 km.
The object has an absolute magnitude Hv=6.7
Diameter=270.4 km assuming a 5% albedo -- 29.2 sec chord
Diameter=110.4 km assuming a 30% albedo -- 11.9 sec chord
Dynamical classification is CLASSICAL
Star training set for 16684, (2025/03/30 21:50UT) Object RA Dec mag sep mel Antares 16:30:57.6 -26:29:09 0.9 2.41 141 23Tau Sco 16:37:27.5 -28:15:58 2.8 3.48 140 22 Sco 16:31:44.8 -25:10:07 4.5 1.60 141 PPM 265669 16:35:44.7 -25:03:09 8.1 0.70 140 PPM 265733 16:39:03.1 -24:51:58 9.8 0.12 140 16684 16:38:36.7 -24:48:02 16.1 139 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 16684, (2025/03/30 21:50UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 2.41 141 23Tau Sco 16:35:52.9 -28:12:58 2.8 3.48 140 22 Sco 16:30:12.5 -25:06:55 4.5 1.60 141 PPM 265669 16:34:12.4 -25:00:05 8.1 0.70 140 PPM 265733 16:37:30.9 -24:49:01 9.8 0.12 140 16684 16:37:04.5 -24:45:04 16.1 140 Positions are for J2000
Event circumstances last updated at 2024/06/09 02:45:40 UT
Marc W. Buie, Southwest Research Institute