RECON: TNO occultation with 05JA175

Event between 05JA175 and star UC4-367-067960 with event index number of 56061

Geocentric closest approach at 2017/04/29 01:16:17 UTC

J2000 position of star is 15:23:41.5 -16:37:02
Equinox of date position of star is 15:24:36.4 -16:40:26
Stellar brightness R=15.6
Star is 158 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=22.5

TNO is 46.9 AU from the Sun and 46.0 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 520 seconds.
The 1-sigma cross-track error in the shadow position is 3814 km.

The TNO has an absolute magnitude Hv=5.8
Diameter=420.7 km assuming a 5% albedo -- 17.1 sec chord
Diameter=171.8 km assuming a 30% albedo -- 7.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 05JA175, (2017/04/29 01:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:28.3 -26:28:08  0.9 18.13 169
27Bet Lib      15:17:56.5 -09:26:45  2.6  7.41 154
32Zet1Lib      15:29:14.2 -16:46:33  5.6  1.10 159
PPM 230166     15:24:29.5 -16:37:30  7.6  0.07 158
05JA175        15:24:40.2 -16:40:40 15.6       158
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 2016/03/14 18:00:17 UT

Marc W. Buie, Southwest Research Institute

RECON