We report the detection of a extrasolar planet candidate orbiting the G1 V star HD 39091 . The orbital period is 2083 d and the eccentricity is 0.62 . With a minimum ( M sin i ) mass of 10.3 M _ { JUP } this object falls near the high mass end of the observed planet mass function , and may plausibly be a brown dwarf . Other characteristics of this system , including orbital eccentricity and metallicity , are typical of the well populated class of radial velocity planets in eccentric orbits around metal-rich stars .