Event between (470309) 07JK43 and star GA0960:05582957 with event index number of 2228174
Geocentric closest approach at 2021/10/21 21:22:37 UTC
J2000 position of star is 17:53:37.9 +06:51:36
Equinox of date position of star is 17:54:41.3 +06:51:24
Stellar brightness G=16.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 128 degrees from the moon.
Moon is 98% illuminated.
TNO apparent brightness V=21.6
TNO is 25.2 AU from the Sun
and 25.6 AU from the Earth.
The TNO is moving 23.0
km/sec on the sky relative to the star, or,
4.5 arcsec/hr.
The 1-sigma error in the time of the event is 43 seconds.
The 1-sigma cross-track error in the shadow position is
961 km.
The TNO has an absolute magnitude Hv=7.3
Diameter=209.9 km assuming a 5% albedo -- 9.1 sec chord
Diameter=85.7 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CENTAURS
Star training set for 470309, (2021/10/21 21:23UT) Object RA Dec mag sep mel Vega 18:37:40.6 +38:48:18 0.0 33.39 104 60Bet Oph 17:44:33.0 +04:33:35 2.8 3.41 132 PPM 164771 17:54:18.0 +06:05:55 5.8 0.76 129 PPM 164724 17:53:04.5 +06:43:33 8.0 0.42 129 PPM 164764 17:54:04.5 +06:48:44 9.2 0.16 129 PPM 164781 17:54:41.4 +06:54:28 10.4 0.05 128 470309 17:54:41.4 +06:51:24 16.9 128 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 470309, (2021/10/21 21:23UT) Object RA Dec mag sep mel Vega 18:36:56.7 +38:47:07 0.0 33.39 104 60Bet Oph 17:43:28.3 +04:34:06 2.8 3.41 132 PPM 164771 17:53:14.0 +06:06:07 5.8 0.76 129 PPM 164724 17:52:00.9 +06:43:47 8.0 0.42 129 PPM 164764 17:53:00.9 +06:48:56 9.2 0.16 129 PPM 164781 17:53:37.8 +06:54:39 10.4 0.05 128 470309 17:53:37.9 +06:51:36 16.9 128 Positions are for J2000
Event circumstances last updated at 2021/10/11 01:41:22 UT
Marc W. Buie, Southwest Research Institute