Event between (552678) 10JG210 and star GA0820:08727808 with event index number of 2222809
Geocentric closest approach at 2025/07/16 16:57:53 UTC
J2000 position of star is 18:19:27.0 -06:03:21
Equinox of date position of star is 18:20:40.4 -06:02:41
Stellar brightness G=14.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 92 degrees from the moon.
Moon is 65% illuminated.
TNO apparent brightness V=21.1
TNO is 17.9 AU from the Sun
and 16.9 AU from the Earth.
The TNO is moving 20.8
km/sec on the sky relative to the star, or,
6.1 arcsec/hr.
The 1-sigma error in the time of the event is 81 seconds.
The 1-sigma cross-track error in the shadow position is
951 km.
The TNO has an absolute magnitude Hv=8.5
Diameter=114.3 km assuming a 5% albedo -- 5.7 sec chord
Diameter=46.7 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
Star training set for 552678, (2025/07/16 16:57UT) Object RA Dec mag sep mel Antares 16:30:58.7 -26:29:11 0.9 33.20 117 60Bet Oph 17:44:44.1 +04:33:30 2.8 13.91 100 PPM 201730 18:26:05.1 -07:03:37 6.5 1.66 90 PPM 201612 18:20:40.2 -05:28:31 8.5 0.57 92 PPM 201620 18:21:04.0 -06:12:57 9.4 0.18 91 552678 18:20:49.1 -06:02:36 14.7 91 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 552678, (2025/07/16 16:57UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 33.20 117 60Bet Oph 17:43:28.3 +04:34:06 2.8 13.91 100 PPM 201730 18:24:42.3 -07:04:34 6.5 1.66 90 PPM 201612 18:19:18.4 -05:29:15 8.5 0.57 92 PPM 201620 18:19:41.8 -06:13:42 9.4 0.18 91 552678 18:19:27.0 -06:03:21 14.7 92 Positions are for J2000
Event circumstances last updated at 2022/10/27 03:10:43 UT
Marc W. Buie, Southwest Research Institute