Event between 99CK158 and star GA1060:03382931 with event index number of 2585631
Geocentric closest approach at 2023/03/21 01:40:09 UTC
J2000 position of star is 11:08:07.8 +16:30:00
Equinox of date position of star is 11:09:20.6 +16:22:30
Stellar brightness G=13.1,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 168 degrees from the moon.
Moon is 1% illuminated.
Apparent brightness V=24.3
Object is 40.2 AU from the Sun
and 39.3 AU from the Earth.
Apparent velocity is 24.0
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 380 seconds.
The 1-sigma cross-track error in the shadow position is
3997 km.
The object has an absolute magnitude Hv=8.2
Diameter=138.7 km assuming a 5% albedo -- 5.8 sec chord
Diameter=56.6 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is SCATEXTD
Star training set for 99CK158, (2023/03/21 01:40UT) Object RA Dec mag sep mel Regulus 10:09:36.4 +11:51:10 1.3 15.17 158 68Del Leo 11:15:20.4 +20:23:46 2.6 4.27 165 70The Leo 11:15:27.4 +15:18:08 3.3 1.82 170 PPM 128007 11:09:54.2 +17:04:25 7.6 0.71 168 PPM 128009 11:10:01.9 +16:40:58 9.7 0.35 168 99CK158 11:09:21.2 +16:22:26 13.1 169 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 99CK158, (2023/03/21 01:40UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 15.17 158 68Del Leo 11:14:06.7 +20:31:22 2.6 4.27 165 70The Leo 11:14:14.3 +15:25:45 3.3 1.82 170 PPM 128007 11:08:40.8 +17:11:59 7.6 0.71 168 PPM 128009 11:08:48.5 +16:48:32 9.7 0.35 168 99CK158 11:08:07.8 +16:30:00 13.1 168 Positions are for J2000
Event circumstances last updated at 2023/01/10 03:22:53 UT
Marc W. Buie, Southwest Research Institute