As determined bydoppler spectroscopy, thejovian planet has an elongated orbit about 0.5AU from its host star and a minimum mass 3.37 times that of Jupiter. Its orbital period of more than 133 days is much longer than that for typicalhot Jupiters.[2]
A study published in 2001 suggested that the usual inability to determine theorbital inclination of an extrasolar planet through radial velocity measurement had caused this mass to be severely underestimated.[3] Theastrometric orbit gives an orbital inclination of 11.8° and a mass of 16 Jupiter masses, which would make the object abrown dwarf. However, later analysis showed that Hipparcos was not sensitive enough to accurately determine astrometric orbits for substellar companions, which means the inclination (and hence the true mass) of the planet are still unknown.[4]
.jpg)
