Event between (278361) 07JJ43 and star GA0640:13639848 with event index number of 2181247
Geocentric closest approach at 2023/02/27 16:28:05 UTC
J2000 position of star is 17:20:17.3 -25:50:06
Equinox of date position of star is 17:21:42.7 -25:51:24
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 172 degrees from the moon.
Moon is 54% illuminated.
Apparent brightness V=20.8
Object is 40.7 AU from the Sun
and 40.9 AU from the Earth.
Apparent velocity is 11.8
km/sec on the sky relative to the star, or,
1.4 arcsec/hr.
The 1-sigma error in the time of the event is 829 seconds.
The 1-sigma cross-track error in the shadow position is
3171 km.
The object has an absolute magnitude Hv=4.5
Diameter=758.6 km assuming a 5% albedo -- 64.4 sec chord
Diameter=309.7 km assuming a 30% albedo -- 26.3 sec chord
Dynamical classification is SCATNEAR
Star training set for 278361, (2023/02/27 16:28UT) Object RA Dec mag sep mel Antares 16:30:49.9 -26:28:53 0.9 11.43 177 23Tau Sco 16:37:19.7 -28:15:43 2.8 10.17 177 PPM 266746 17:23:06.9 -24:55:39 6.5 0.98 171 PPM 266738 17:22:56.5 -26:21:33 8.4 0.57 171 PPM 266713 17:22:14.3 -25:52:19 9.9 0.12 172 278361 17:21:43.3 -25:51:25 16.0 171 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 278361, (2023/02/27 16:28UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 11.43 177 23Tau Sco 16:35:52.9 -28:12:58 2.8 10.17 177 PPM 266746 17:21:41.5 -24:54:23 6.5 0.98 171 PPM 266738 17:21:30.2 -26:20:17 8.4 0.57 171 PPM 266713 17:20:48.3 -25:51:02 9.9 0.12 172 278361 17:20:17.3 -25:50:06 16.0 172 Positions are for J2000
Event circumstances last updated at 2023/01/08 03:30:52 UT
Marc W. Buie, Southwest Research Institute