Event between (523790) 15HP9 and star GA0680:26905826 with event index number of 2604844
Geocentric closest approach at 2026/05/17 16:18:50 UTC
J2000 position of star is 18:27:54.1 -20:57:05
Equinox of date position of star is 18:29:21.8 -20:56:04
Stellar brightness G=16.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 151 degrees from the moon.
Moon is 1% illuminated.
Apparent brightness V=23.0
Object is 17.5 AU from the Sun
and 16.7 AU from the Earth.
Apparent velocity is 15.4
km/sec on the sky relative to the star, or,
4.6 arcsec/hr.
The 1-sigma error in the time of the event is 414 seconds.
The 1-sigma cross-track error in the shadow position is
610 km.
The object has an absolute magnitude Hv=10.5
Diameter=50.1 km assuming a 5% albedo -- 3.1 sec chord
Diameter=20.5 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
Star training set for 523790, (2026/05/17 16:19UT) Object RA Dec mag sep mel Antares 16:31:01.7 -26:29:17 0.9 27.61 179 Nunki 18:56:53.9 -26:15:41 2.0 8.23 147 21 Sgr 18:26:55.3 -20:31:31 4.1 0.72 152 PPM 268487 18:31:25.8 -20:55:59 8.3 0.46 151 PPM 268444 18:29:40.6 -20:47:34 9.9 0.15 151 523790 18:29:28.6 -20:55:59 16.8 151 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, (2026/05/17 16:19UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 27.61 179 Nunki 18:55:15.9 -26:17:49 2.0 8.23 147 21 Sgr 18:25:21.1 -20:32:31 4.1 0.72 152 PPM 268487 18:29:51.3 -20:57:10 8.3 0.46 151 PPM 268444 18:28:06.2 -20:48:40 9.9 0.15 151 523790 18:27:54.1 -20:57:05 16.8 151 Positions are for J2000
Event circumstances last updated at 2024/06/19 21:23:39 UT
Marc W. Buie, Southwest Research Institute