RECON: TNO occultation with 471143

Event between (471143) 10EK139 and star UC4-248-065423 with event index number of 183447

Geocentric closest approach at 2019/03/13 19:48:59 UTC

J2000 position of star is 14:09:43.4 -40:35:39
Equinox of date position of star is 14:10:47.5 -40:40:32
Stellar brightness R=16.3, use SENSEUP=128
Star is 138 degrees from the moon. Moon is 44% illuminated.
TNO apparent brightness V=19.6

TNO is 36.0 AU from the Sun and 35.5 AU from the Earth.
The TNO is moving 17.2 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 145 seconds.
The 1-sigma cross-track error in the shadow position is 2203 km.

The TNO has an absolute magnitude Hv=3.9
Diameter=1000.0 km assuming a 5% albedo -- 58.1 sec chord
Diameter=408.3 km assuming a 30% albedo -- 23.7 sec chord
Dynamical classification is 7:2EEEEE
 
 
 
 
 
 
 
 

Star training set for 471143, (2019/03/13 19:49UT)
Object            RA         Dec     mag  sep  mel
Hadar          14:05:11.7 -60:27:53  0.6 19.80 129
5The Cen       14:07:49.2 -36:27:48  2.1  4.26 139
Chi Cen        14:07:13.5 -41:16:17  4.5  0.91 138
PPM 319201     14:08:44.1 -40:44:31  7.8  0.42 138
PPM 319238     14:10:34.4 -40:42:24  9.3  0.07 138
471143         14:10:54.2 -40:41:03 16.3       139
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 471143, (2019/03/13 19:49UT)
Object            RA         Dec     mag  sep  mel
Hadar          14:03:49.3 -60:22:23  0.6 19.80 129
5The Cen       14:06:40.2 -36:22:21  2.1  4.26 139
Chi Cen        14:06:02.7 -41:10:49  4.5  0.91 138
PPM 319201     14:07:33.3 -40:39:05  7.8  0.42 138
PPM 319238     14:09:23.6 -40:37:00  9.3  0.07 138
471143         14:09:43.4 -40:35:39 16.3       138
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:12:15 UT

Marc W. Buie, Southwest Research Institute

RECON