Event between 12HE85 and star GA0700:38053683 with event index number of 2825288
Geocentric closest approach at 2023/07/12 22:17:38 UTC
J2000 position of star is 19:42:22.2 -18:39:38
Equinox of date position of star is 19:43:43.3 -18:36:15
Stellar brightness G=15.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 121 degrees from the moon.
Moon is 22% illuminated.
Apparent brightness V=25.0
Object is 40.4 AU from the Sun
and 39.4 AU from the Earth.
Apparent velocity is 24.3
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 813 seconds.
The 1-sigma cross-track error in the shadow position is
4217 km.
The object has an absolute magnitude Hv=9.0
Diameter=96.8 km assuming a 5% albedo -- 4.0 sec chord
Diameter=39.5 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is 9:5EEEE
Star training set for 12HE85, (2023/07/12 22:18UT) Object RA Dec mag sep mel Antares 16:30:51.2 -26:28:56 0.9 44.97 165 Nunki 18:56:43.4 -26:15:55 2.0 13.28 133 PPM 236251 19:38:25.2 -18:10:37 5.7 1.33 122 PPM 236394 19:44:34.4 -19:03:17 8.5 0.49 121 PPM 236372 19:43:48.8 -18:28:03 9.4 0.14 121 12HE85 19:43:44.1 -18:36:13 15.5 120 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 12HE85, (2023/07/12 22:18UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 44.97 165 Nunki 18:55:15.9 -26:17:49 2.0 13.28 133 PPM 236251 19:37:03.4 -18:13:52 5.7 1.33 122 PPM 236394 19:43:12.3 -19:06:44 8.5 0.49 121 PPM 236372 19:42:26.9 -18:31:29 9.4 0.14 121 12HE85 19:42:22.2 -18:39:38 15.5 121 Positions are for J2000
Event circumstances last updated at 2023/04/19 02:41:04 UT
Marc W. Buie, Southwest Research Institute