Event between (523790) 15HP9 and star GA0680:20219607 with event index number of 2603940
Geocentric closest approach at 2025/07/24 12:14:49 UTC
J2000 position of star is 17:53:41.2 -20:56:17
Equinox of date position of star is 17:55:08.9 -20:56:29
Stellar brightness G=16.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon.
Moon is 0% illuminated.
Apparent brightness V=22.9
Object is 17.1 AU from the Sun
and 16.3 AU from the Earth.
Apparent velocity is 17.4
km/sec on the sky relative to the star, or,
5.3 arcsec/hr.
The 1-sigma error in the time of the event is 289 seconds.
The 1-sigma cross-track error in the shadow position is
653 km.
The object has an absolute magnitude Hv=10.5
Diameter=50.1 km assuming a 5% albedo -- 2.8 sec chord
Diameter=20.5 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
Star training set for 523790, (2025/07/24 12:15UT) Object RA Dec mag sep mel Antares 16:30:58.7 -26:29:11 0.9 20.03 132 35Eta Oph 17:11:50.8 -15:45:17 2.6 11.52 138 PPM 267640 18:01:31.4 -20:20:21 6.0 1.59 151 PPM 267493 17:56:12.7 -21:01:27 8.5 0.25 150 PPM 267458 17:54:34.6 -20:51:17 9.0 0.17 150 523790 17:55:12.9 -20:56:29 16.8 150 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 523790, (2025/07/24 12:15UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 20.03 132 35Eta Oph 17:10:22.7 -15:43:29 2.6 11.52 138 PPM 267640 18:00:00.1 -20:20:23 6.0 1.59 151 PPM 267493 17:54:41.0 -21:01:17 8.5 0.25 150 PPM 267458 17:53:03.0 -20:51:03 9.0 0.17 150 523790 17:53:41.2 -20:56:17 16.8 150 Positions are for J2000
Event circumstances last updated at 2024/06/18 02:51:23 UT
Marc W. Buie, Southwest Research Institute