Target Description
    ==================
      GJ 436 (Gliese 436) is a star with a detected substellar companion,
      GJ 436 b, and is a target of the Extrasolar Planet Observation and
      CHaracterization (EPOCh) phase of the NASA EPOXI mission.  Other
      designations for this star are USNO-B1.0 1167-00204205 and 2MASS
      J11421096+2642251.  The star has the following astrometric and
      photometric properties:
 
        Spectral type        : M2.5
        Apparent V Magnitude : 10.68
        Distance             : 10.2 pc
        Mass                 : 0.452 (-0.012/+0.014) solar masses
        Radius               : 0.464 (-0.011/+0.009) solar radii
        RA                   : 11 42 11.094 (FK5, epoch and equinox 2000)
        Dec                  : +26 42 23.65 (FK5, epoch and equinox 2000)
 
      The substellar companion GJ 436 b was discovered in 2004 by Paul
      Butler of the Carnegie Institute of Washington and Geoffrey Marcy of
      the University of California, Berkeley.  The known properties of this
      extrasolar planet are:
 
        Mass               : 0.072 (+/- 0.0025) Jupiter masses
        Semi major axis    : 0.02872 (-5.8e-05/+6e-05) AU
        Orbital period     : 2.6438986 (-/+1.6e-06) days
        Eccentricity       : 0.15 (-/+0.012)
        Radius             : 0.438 (-0.03/+0.04) Jupiter radii
        Inclination        : 85.8 (-0.25/+0.21) deg
 
      The astrometric and photometric properties were taken from the
      13 May 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.