Event between (576257) 12JD68 and star GA0960:05461582 with event index number of 2528587
Geocentric closest approach at 2025/06/16 23:57:43 UTC
J2000 position of star is 17:49:01.3 +06:26:29
Equinox of date position of star is 17:50:05.2 +06:26:09
Stellar brightness G=12.6,
use SENSEUP=16 with the MallinCam and and exposure
time of 250 milli-seconds with the QHY174 camera.
Star is 71 degrees from the moon.
Moon is 70% illuminated.
TNO apparent brightness V=22.7
TNO is 28.0 AU from the Sun
and 27.1 AU from the Earth.
The TNO is moving 23.0
km/sec on the sky relative to the star, or,
4.2 arcsec/hr.
The 1-sigma error in the time of the event is 182 seconds.
The 1-sigma cross-track error in the shadow position is
1054 km.
The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 6.0 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 3:2E+6:4II
Star training set for 576257, (2025/06/16 23:58UT) Object RA Dec mag sep mel Vega 18:37:48.0 +38:48:30 0.0 34.11 73 60Bet Oph 17:44:43.9 +04:33:30 2.8 2.33 71 PPM 164771 17:54:28.7 +06:05:53 5.8 1.10 69 PPM 164562 17:47:51.1 +06:06:46 7.8 0.68 71 PPM 164604 17:49:24.8 +06:15:53 9.1 0.27 71 PPM 164635 17:50:20.7 +06:40:25 10.9 0.24 71 576257 17:50:15.7 +06:26:06 12.6 70 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, (2025/06/16 23:58UT) Object RA Dec mag sep mel Vega 18:36:56.7 +38:47:07 0.0 34.11 73 60Bet Oph 17:43:28.3 +04:34:06 2.8 2.33 71 PPM 164771 17:53:14.0 +06:06:07 5.8 1.10 69 PPM 164562 17:46:36.5 +06:07:14 7.8 0.68 71 PPM 164604 17:48:10.2 +06:16:18 9.1 0.27 71 PPM 164635 17:49:06.4 +06:40:48 10.9 0.24 71 576257 17:49:01.3 +06:26:29 12.6 71 Positions are for J2000
Event circumstances last updated at 2021/11/10 00:13:19 UT
Marc W. Buie, Southwest Research Institute