Target Description
    ==================
      TrES-3 is a star with a detected substellar companion with the same
      designation, TrES-3, and is a target of the Extrasolar Planet
      Observation and CHaracterization (EPOCh) phase of the NASA EPOXI
      mission.  Other designations for this star are GSC 03089-00929 and
      1SWASP J175207.01+373246.3.  The star has the following astrometric
      and photometric properties:
 
        Spectral type        : G
        Apparent V Magnitude : 12.4
        Distance             : 398 (+/- 92) pc
        Mass                 : 0.924 (-0.04/+0.012) solar masses
        Radius               : 0.813 (-0.027/+0.012) solar radii
        RA                   : 17 52 07.020 (FK5, epoch and equinox 2000)
        Dec                  : +37 32 46.18 (FK5, epoch and equinox 2000)
 
      The substellar companion TrES-3 was discovered in 2007 by the
      Trans-atlantic Exoplanet Survey (TrES).  The known properties of
      this extrasolar planet are:
 
        Mass               : 1.92 (-/+0.023) Jupiter masses
        Semi major axis    : 0.0226 (+/-0.0013) AU
        Orbital period     : 1.30619 (-/+1e-5) days
        Eccentricity       : 0
        Radius             : 1.295 (-/+0.081) Jupiter radii
        Inclination        : 82.15 (-/+0.21) deg
 
      The astrometric and photometric properties were taken from the
      23 June 2009 update for this planetary system in the Extrasolar
      Planets Encyclopedia.  The encyclopedia is maintained by the Paris
      Observatory and is available online at http://exoplanet.eu.  Please
      consult this web site for the most up-to-date properties.