Event between (499522) 10PL66 and star GA1100:00197686 with event index number of 2653805
Geocentric closest approach at 2026/06/28 15:20:07 UTC
J2000 position of star is 01:46:11.4 +20:10:58
Equinox of date position of star is 01:47:31.1 +20:18:11
Stellar brightness G=16.3,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 130 degrees from the moon.
Moon is 98% illuminated.
Apparent brightness V=20.3
Object is 16.4 AU from the Sun
and 16.8 AU from the Earth.
Apparent velocity is 21.0
km/sec on the sky relative to the star, or,
6.2 arcsec/hr.
The 1-sigma error in the time of the event is 60 seconds.
The 1-sigma cross-track error in the shadow position is
1231 km.
The object has an absolute magnitude Hv=7.8
Diameter=162.9 km assuming a 5% albedo -- 7.8 sec chord
Diameter=66.5 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is CENTAURR
Star training set for 499522, (2026/06/28 15:19UT) Object RA Dec mag sep mel Aldebaran 04:37:26.6 +16:33:38 0.8 40.34 164 6Bet Ari 01:56:06.5 +20:56:11 2.6 2.08 132 107 Psc 01:43:56.5 +20:23:49 6.0 0.87 129 109 Psc 01:46:23.0 +20:12:52 7.1 0.31 130 PPM 091058 01:47:19.3 +20:26:20 9.9 0.15 130 499522 01:47:38.7 +20:18:52 16.3 130 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 499522, (2026/06/28 15:19UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 40.34 164 6Bet Ari 01:54:38.6 +20:48:26 2.6 2.08 132 107 Psc 01:42:29.3 +20:15:51 6.0 0.87 129 109 Psc 01:44:55.7 +20:04:57 7.1 0.31 130 PPM 091058 01:45:52.0 +20:18:26 9.9 0.15 130 499522 01:46:11.4 +20:10:58 16.3 130 Positions are for J2000
Event circumstances last updated at 2024/03/05 04:29:34 UT
Marc W. Buie, Southwest Research Institute