Event between (577627) 13HZ156 and star GA0880:04746538 with event index number of 2524624
Geocentric closest approach at 2026/09/28 08:09:18 UTC
J2000 position of star is 16:19:14.2 -01:06:20
Equinox of date position of star is 16:20:22.5 -01:09:27
Stellar brightness G=16.1,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 136 degrees from the moon.
Moon is 97% illuminated.
TNO apparent brightness V=23.2
TNO is 38.3 AU from the Sun
and 38.8 AU from the Earth.
The TNO is moving 22.6
km/sec on the sky relative to the star, or,
2.9 arcsec/hr.
The 1-sigma error in the time of the event is 348 seconds.
The 1-sigma cross-track error in the shadow position is
4452 km.
The TNO has an absolute magnitude Hv=7.2
Diameter=217.8 km assuming a 5% albedo -- 9.6 sec chord
Diameter=88.9 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is SCATEXTD
Star training set for 577627, (2026/09/28 08:09UT) Object RA Dec mag sep mel Antares 16:31:03.1 -26:29:20 0.9 25.44 137 1Del Oph 16:15:45.0 -03:45:40 2.7 2.86 138 PPM 199363 16:11:14.7 -03:32:07 5.0 3.33 139 PPM 179768 16:17:42.6 -01:42:45 7.5 0.91 137 PPM 179776 16:19:51.0 -00:55:09 9.8 0.31 136 PPM 179779 16:20:23.4 -01:16:27 10.7 0.12 136 577627 16:20:37.1 -01:10:07 16.1 136 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 577627, (2026/09/28 08:09UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 25.44 137 1Del Oph 16:14:20.7 -03:41:43 2.7 2.86 138 PPM 199363 16:09:50.5 -03:28:00 5.0 3.33 139 PPM 179768 16:16:19.4 -01:38:52 7.5 0.91 137 PPM 179776 16:18:28.3 -00:51:21 9.8 0.31 136 PPM 179779 16:19:00.5 -01:12:40 10.7 0.12 136 577627 16:19:14.2 -01:06:20 16.1 136 Positions are for J2000
Event circumstances last updated at 2022/01/17 00:16:36 UT
Marc W. Buie, Southwest Research Institute