Event between (470309) 07JK43 and star UC4-479-068749 with event index number of 329932
Geocentric closest approach at 2020/05/20 21:59:51 UTC
J2000 position of star is 17:49:47.9 +05:36:56
Equinox of date position of star is 17:50:45.1 +05:36:39
Stellar brightness R=13.1,
use SENSEUP=32
Star is 129 degrees from the moon.
Moon is 3% illuminated.
TNO apparent brightness V=21.0
TNO is 24.8 AU from the Sun
and 24.0 AU from the Earth.
The TNO is moving 23.0
km/sec on the sky relative to the star, or,
4.8 arcsec/hr.
The 1-sigma error in the time of the event is 67 seconds.
The 1-sigma cross-track error in the shadow position is
1430 km.
The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 10.4 sec chord
Diameter=97.9 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CENTAURR
Star training set for 470309, (2020/05/20 22:00UT) Object RA Dec mag sep mel Vega 18:37:37.7 +38:48:13 0.0 34.85 105 60Bet Oph 17:44:28.8 +04:33:37 2.8 1.89 131 PPM 164771 17:54:13.8 +06:05:55 5.8 0.98 128 PPM 164620 17:49:43.4 +05:41:45 7.2 0.28 129 PPM 164665 17:51:04.9 +05:41:23 9.6 0.11 129 470309 17:50:47.9 +05:36:38 13.1 129 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, (2020/05/20 22:00UT) Object RA Dec mag sep mel Vega 18:36:56.7 +38:47:07 0.0 34.85 105 60Bet Oph 17:43:28.3 +04:34:05 2.8 1.89 131 PPM 164771 17:53:14.0 +06:06:06 5.8 0.98 128 PPM 164620 17:48:43.4 +05:42:04 7.2 0.28 129 PPM 164665 17:50:04.9 +05:41:40 9.6 0.11 129 470309 17:49:47.9 +05:36:56 13.1 129 Positions are for J2000
Event circumstances last updated at 2019/06/07 23:40:13 UT
Marc W. Buie, Southwest Research Institute