Event between (309239) 07RW10 and star GA0820:00241871 with event index number of 2525844
Geocentric closest approach at 2028/12/08 13:54:28 UTC
J2000 position of star is 03:08:03.1 -07:18:24
Equinox of date position of star is 03:09:14.0 -07:12:57
Stellar brightness G=15.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 112 degrees from the moon.
Moon is 58% illuminated.
Apparent brightness V=22.0
Object is 33.4 AU from the Sun
and 32.7 AU from the Earth.
Apparent velocity is 21.3
km/sec on the sky relative to the star, or,
3.2 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
1214 km.
The object has an absolute magnitude Hv=6.7
Diameter=264.2 km assuming a 5% albedo -- 12.7 sec chord
Diameter=107.9 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is CENTAURR
Star training set for 309239, (2028/12/08 13:55UT) Object RA Dec mag sep mel Rigel 05:15:55.8 -08:10:13 0.1 31.34 81 Menkar 03:03:47.8 +04:12:06 2.5 11.49 112 10Rho3Eri 03:05:41.9 -07:29:22 5.7 0.98 113 PPM 185403 03:08:05.4 -06:31:56 8.2 0.75 112 PPM 185417 03:08:43.9 -07:26:24 9.3 0.30 112 309239 03:09:28.5 -07:11:50 15.9 111 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, (2028/12/08 13:55UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 31.34 81 Menkar 03:02:16.8 +04:05:21 2.5 11.49 112 10Rho3Eri 03:04:16.6 -07:36:03 5.7 0.98 113 PPM 185403 03:06:39.7 -06:38:32 8.2 0.75 112 PPM 185417 03:07:18.6 -07:33:00 9.3 0.30 112 309239 03:08:03.1 -07:18:24 15.9 112 Positions are for J2000
Event circumstances last updated at 2024/01/09 22:28:44 UT
Marc W. Buie, Southwest Research Institute