RECON: TNO occultation with 471143

Event between (471143) Dziewanna and star GA0480:07118342 with event index number of 243683

Geocentric closest approach at 2020/02/01 15:25:15 UTC

J2000 position of star is 14:19:45.2 -41:19:16
Equinox of date position of star is 14:20:58.1 -41:24:34
Stellar brightness G=15.9, use SENSEUP=128
Star is 148 degrees from the moon. Moon is 46% illuminated.
TNO apparent brightness V=19.6

TNO is 35.7 AU from the Sun and 35.8 AU from the Earth.
The TNO is moving 16.9 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 194 seconds.
The 1-sigma cross-track error in the shadow position is 4206 km.

The TNO has an absolute magnitude Hv=3.9
Diameter=1000.0 km assuming a 5% albedo -- 59.3 sec chord
Diameter=408.3 km assuming a 30% albedo -- 24.2 sec chord
Dynamical classification is 7:2EEEEE
 
 
 
 
 
 
 
 

Star training set for 471143, (2020/02/01 15:25UT)
Object            RA         Dec     mag  sep  mel
Hadar          14:05:15.6 -60:28:08  0.6 19.21 129
5The Cen       14:07:52.3 -36:28:04  2.1  5.56 153
PPM 319325     14:15:57.6 -41:55:50  5.5  1.08 148
PPM 319399     14:20:47.8 -41:02:41  7.7  0.37 149
PPM 319433     14:22:39.3 -41:25:43  9.7  0.31 148
PPM 319384     14:19:57.0 -41:24:22 10.1  0.20 148
471143         14:21:00.6 -41:24:45 15.9       148
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, (2020/02/01 15:25UT)
Object            RA         Dec     mag  sep  mel
Hadar          14:03:49.3 -60:22:23  0.6 19.21 129
5The Cen       14:06:40.1 -36:22:22  2.1  5.56 153
PPM 319325     14:14:42.5 -41:50:15  5.5  1.08 148
PPM 319399     14:19:32.6 -40:57:11  7.7  0.37 149
PPM 319433     14:21:23.7 -41:20:15  9.7  0.31 148
PPM 319384     14:18:41.7 -41:18:52 10.1  0.20 148
471143         14:19:45.2 -41:19:16 15.9       148
Positions are for J2000

Event circumstances last updated at 2019/06/07 23:13:26 UT

Marc W. Buie, Southwest Research Institute

RECON