RECON: TNO occultation with 455206

Event between (455206) 01FE193 and star UC4-413-058532 with event index number of 105300

Geocentric closest approach at 2017/04/19 16:01:11 UTC

J2000 position of star is 13:34:50.7 -07:31:26
Equinox of date position of star is 13:35:41.8 -07:36:23
Stellar brightness R=14.5
Star is 98 degrees from the moon. Moon is 48% illuminated.
TNO apparent brightness V=23.6

TNO is 44.2 AU from the Sun and 43.2 AU from the Earth.
The TNO is moving 25.0 km/sec on the sky relative to the star, or, 2.9 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 3664 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=218.8 km assuming a 5% albedo -- 8.8 sec chord
Diameter=89.3 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 455206, (2017/04/19 16:01UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:06.4 -11:15:04  1.0  4.35  99
74 Vir         13:32:52.0 -06:20:41  4.1  1.46  99
PPM 196627     13:34:18.9 -07:42:39  7.6  0.37  98
PPM 196644     13:35:33.4 -07:41:39  9.7  0.10  98
455206         13:35:45.2 -07:36:43 14.5        98
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.

Event circumstances last updated at 2016/03/20 17:20:40 UT

Marc W. Buie, Southwest Research Institute

RECON