Event between (309239) 07RW10 and star GA0840:00209876 with event index number of 2186110
Geocentric closest approach at 2025/02/24 08:15:36 UTC
J2000 position of star is 02:38:47.4 -05:20:39
Equinox of date position of star is 02:39:59.4 -05:14:29
Stellar brightness G=10.1,
use SENSEUP=2 with the MallinCam and and exposure
time of 125 milli-seconds with the QHY174 camera.
Star is 105 degrees from the moon.
Moon is 17% illuminated.
Apparent brightness V=22.0
Object is 32.3 AU from the Sun
and 32.8 AU from the Earth.
Apparent velocity is 20.0
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 64 seconds.
The 1-sigma cross-track error in the shadow position is
1268 km.
The object has an absolute magnitude Hv=6.7
Diameter=264.2 km assuming a 5% albedo -- 13.5 sec chord
Diameter=107.9 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is CENTAURR
Star training set for 309239, (2025/02/24 08:16UT) Object RA Dec mag sep mel Aldebaran 04:37:22.0 +16:33:29 0.8 36.28 140 68Omi Cet 02:20:37.1 -02:51:52 2.0 5.39 102 81 Cet 02:38:58.0 -03:17:19 5.6 1.97 105 PPM 184896 02:41:49.6 -04:55:10 8.5 0.55 105 PPM 184863 02:40:12.4 -05:04:15 9.5 0.17 105 309239 02:40:02.7 -05:14:12 10.1 105 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 309239, (2025/02/24 08:16UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 36.28 140 68Omi Cet 02:19:20.8 -02:58:45 2.0 5.39 102 81 Cet 02:37:41.9 -03:23:48 5.6 1.97 105 PPM 184896 02:40:34.2 -05:01:34 8.5 0.55 105 PPM 184863 02:38:57.0 -05:10:41 9.5 0.17 105 309239 02:38:47.4 -05:20:39 10.1 105 Positions are for J2000
Event circumstances last updated at 2024/01/08 05:12:59 UT
Marc W. Buie, Southwest Research Institute