Event between (576257) 12JD68 and star GA0940:05539350 with event index number of 2528544
Geocentric closest approach at 2025/02/16 23:52:57 UTC
J2000 position of star is 17:52:10.4 +04:51:57
Equinox of date position of star is 17:53:15.1 +04:51:43
Stellar brightness G=16.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 73 degrees from the moon.
Moon is 83% illuminated.
TNO apparent brightness V=22.9
TNO is 28.0 AU from the Sun
and 28.4 AU from the Earth.
The TNO is moving 25.0
km/sec on the sky relative to the star, or,
4.4 arcsec/hr.
The 1-sigma error in the time of the event is 153 seconds.
The 1-sigma cross-track error in the shadow position is
2303 km.
The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 5.5 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is 3:2E+6:4II
Star training set for 576257, (2025/02/16 23:53UT) Object RA Dec mag sep mel Vega 18:37:47.3 +38:48:29 0.0 35.41 90 60Bet Oph 17:44:42.9 +04:33:31 2.8 2.19 71 PPM 164771 17:54:27.7 +06:05:53 5.8 1.26 74 PPM 164779 17:54:50.3 +04:51:20 7.8 0.35 74 PPM 164714 17:53:04.7 +04:52:28 9.0 0.08 73 576257 17:53:24.8 +04:51:41 16.5 74 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, (2025/02/16 23:53UT) Object RA Dec mag sep mel Vega 18:36:56.7 +38:47:07 0.0 35.41 90 60Bet Oph 17:43:28.3 +04:34:06 2.8 2.19 71 PPM 164771 17:53:14.0 +06:06:07 5.8 1.26 74 PPM 164779 17:53:35.8 +04:51:33 7.8 0.35 74 PPM 164714 17:51:50.3 +04:52:44 9.0 0.08 73 576257 17:52:10.4 +04:51:57 16.5 73 Positions are for J2000
Event circumstances last updated at 2021/11/05 23:07:25 UT
Marc W. Buie, Southwest Research Institute