Event between (307261) 02MS4 and star GA0840:16590394 with event index number of 2185208
Geocentric closest approach at 2025/06/07 21:36:59 UTC
J2000 position of star is 19:13:18.9 -05:00:02
Equinox of date position of star is 19:14:35.9 -04:57:28
Stellar brightness G=16.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 72 degrees from the moon.
Moon is 89% illuminated.
Apparent brightness V=20.3
Object is 46.1 AU from the Sun
and 45.3 AU from the Earth.
Apparent velocity is 21.2
km/sec on the sky relative to the star, or,
2.3 arcsec/hr.
The 1-sigma error in the time of the event is 214 seconds.
The 1-sigma cross-track error in the shadow position is
1982 km.
The object has an absolute magnitude Hv=3.6
Diameter=1066.6 km assuming a 5% albedo -- 53.6 sec chord
Diameter=435.5 km assuming a 30% albedo -- 21.9 sec chord
Dynamical classification is SCATEXTD
Star training set for 307261, (2025/06/07 21:37UT) Object RA Dec mag sep mel Antares 16:30:58.3 -26:29:10 0.9 44.58 30 Tarazed 19:47:28.1 +10:40:37 2.7 17.64 85 16Lam Aql 19:07:35.9 -04:50:32 3.4 1.76 70 PPM 202644 19:13:48.7 -05:22:14 8.3 0.47 71 PPM 202666 19:14:47.9 -04:51:08 9.1 0.11 72 307261 19:14:39.9 -04:57:20 16.8 72 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 307261, (2025/06/07 21:37UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 44.58 30 Tarazed 19:46:15.6 +10:36:48 2.7 17.64 85 16Lam Aql 19:06:14.9 -04:52:59 3.4 1.76 70 PPM 202644 19:12:27.4 -05:24:54 8.3 0.47 71 PPM 202666 19:13:27.0 -04:53:50 9.1 0.11 72 307261 19:13:18.9 -05:00:02 16.8 72 Positions are for J2000
Event circumstances last updated at 2024/03/02 06:19:10 UT
Marc W. Buie, Southwest Research Institute