Event between (576257) 12JD68 and star GA0960:05869202 with event index number of 2528760
Geocentric closest approach at 2026/05/23 21:57:21 UTC
J2000 position of star is 18:02:59.8 +06:26:18
Equinox of date position of star is 18:04:04.3 +06:26:25
Stellar brightness G=16.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 110 degrees from the moon.
Moon is 55% illuminated.
TNO apparent brightness V=22.8
TNO is 28.0 AU from the Sun
and 27.3 AU from the Earth.
The TNO is moving 20.7
km/sec on the sky relative to the star, or,
3.8 arcsec/hr.
The 1-sigma error in the time of the event is 229 seconds.
The 1-sigma cross-track error in the shadow position is
2582 km.
The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 6.7 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 3:2E+6:4II
Star training set for 576257, (2026/05/23 21:57UT) Object RA Dec mag sep mel Vega 18:37:49.9 +38:48:33 0.0 33.24 107 60Bet Oph 17:44:46.7 +04:33:29 2.8 5.21 105 PPM 164995 18:02:10.1 +06:16:10 6.4 0.55 109 PPM 165104 18:05:32.2 +06:33:35 9.9 0.33 110 PPM 165067 18:04:18.3 +06:30:29 11.3 0.07 110 576257 18:04:17.0 +06:26:27 16.8 110 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 576257, (2026/05/23 21:57UT) Object RA Dec mag sep mel Vega 18:36:56.7 +38:47:07 0.0 33.24 107 60Bet Oph 17:43:28.3 +04:34:06 2.8 5.21 105 PPM 164995 18:00:52.8 +06:16:06 6.4 0.55 109 PPM 165104 18:04:15.1 +06:33:24 9.9 0.33 110 PPM 165067 18:03:01.2 +06:30:20 11.3 0.07 110 576257 18:02:59.8 +06:26:18 16.8 110 Positions are for J2000
Event circumstances last updated at 2022/01/13 00:32:48 UT
Marc W. Buie, Southwest Research Institute