A Planet Orbiting 47 Ursae Majoris

  title={A Planet Orbiting 47 Ursae Majoris},
  author={R. Paul Butler and Geoffrey W. Marcy},
  journal={The Astrophysical Journal Letters},
  pages={L153 - L156}
The G0 V star 47 UMa exhibits very low amplitude radial velocity variations having a period of 2.98 yr, a velocity amplitude of K = 45.5 m s-1, and small eccentricity. The residuals scatter by 11 m s-1 from a Keplerian fit to the 34 velocity measurements obtained during 8 yr. The minimum mass of the unseen companion is M2 sin i = 2.39 MJ, and for likely orbital inclinations of 30°-90°, its mass is less than 4.8 MJ. This mass resides in a regime associated with extrasolar giant planets (Burrows… 

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