Event between (550310) 12DD86 and star GA0800:05164408 with event index number of 2400075
Geocentric closest approach at 2026/04/23 18:47:57 UTC
J2000 position of star is 16:23:56.2 -09:08:27
Equinox of date position of star is 16:25:16.2 -09:11:45
Stellar brightness G=16.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 124 degrees from the moon.
Moon is 47% illuminated.
Apparent brightness V=22.3
Object is 18.7 AU from the Sun
and 17.8 AU from the Earth.
Apparent velocity is 18.1
km/sec on the sky relative to the star, or,
5.0 arcsec/hr.
The 1-sigma error in the time of the event is 71 seconds.
The 1-sigma cross-track error in the shadow position is
787 km.
The object has an absolute magnitude Hv=9.5
Diameter=75.2 km assuming a 5% albedo -- 4.3 sec chord
Diameter=30.7 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
Star training set for 550310, (2026/04/23 18:53UT) Object RA Dec mag sep mel Antares 16:31:01.5 -26:29:17 0.9 17.34 130 13Zet Oph 16:38:36.6 -10:37:06 2.6 3.56 128 3Ups Oph 16:29:13.7 -08:25:43 4.2 1.23 125 PPM 199584 16:23:43.2 -08:48:07 7.9 0.57 124 PPM 199620 16:25:34.0 -09:09:45 8.8 0.06 124 550310 16:25:22.3 -09:12:00 16.7 125 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 550310, (2026/04/23 18:53UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 17.34 130 13Zet Oph 16:37:09.6 -10:34:01 2.6 3.56 128 3Ups Oph 16:27:48.0 -08:22:18 4.2 1.23 125 PPM 199584 16:22:17.4 -08:44:30 7.9 0.57 124 PPM 199620 16:24:07.9 -09:06:12 8.8 0.06 124 550310 16:23:56.2 -09:08:27 16.7 124 Positions are for J2000
Event circumstances last updated at 2024/06/18 21:26:21 UT
Marc W. Buie, Southwest Research Institute