Event between (32532) Thereus and star GA0780:04263829 with event index number of 2196042
Geocentric closest approach at 2025/12/07 20:51:47 UTC
J2000 position of star is 12:39:18.0 -10:35:38
Equinox of date position of star is 12:40:33.8 -10:43:38
Stellar brightness G=16.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 77 degrees from the moon.
Moon is 88% illuminated.
Apparent brightness V=20.0
Object is 10.7 AU from the Sun
and 11.2 AU from the Earth.
Apparent velocity is 22.2
km/sec on the sky relative to the star, or,
9.9 arcsec/hr.
The 1-sigma error in the time of the event is 28 seconds.
The 1-sigma cross-track error in the shadow position is
458 km.
The object has an absolute magnitude Hv=9.2
Diameter=86.3 km assuming a 5% albedo -- 3.9 sec chord
Diameter=35.2 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
Star training set for 32532, (2025/12/07 20:51UT) Object RA Dec mag sep mel Spica 13:26:33.8 -11:17:45 1.0 11.28 88 4Gam Crv 12:17:08.7 -17:41:09 2.6 8.98 76 21 Vir 12:35:07.2 -09:35:41 5.6 1.78 75 PPM 195661 12:38:52.0 -09:48:07 8.5 1.03 76 PPM 226129 12:39:50.0 -10:41:15 9.1 0.21 77 32532 12:40:38.9 -10:44:10 16.9 78 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 32532, (2025/12/07 20:51UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 11.28 88 4Gam Crv 12:15:48.1 -17:32:30 2.6 8.98 76 21 Vir 12:33:46.6 -09:27:07 5.6 1.78 75 PPM 195661 12:37:31.2 -09:39:34 8.5 1.03 76 PPM 226129 12:38:29.1 -10:32:43 9.1 0.21 77 32532 12:39:18.0 -10:35:38 16.9 77 Positions are for J2000
Event circumstances last updated at 2024/04/22 04:01:18 UT
Marc W. Buie, Southwest Research Institute