HD 154672 b

This planet has a minimum mass five times that of Jupiter and orbits at about 60% the distance between the Earth to the Sun.

This planet was discovered in Las Campanas Observatory on September 5, 2008 using the radial velocity method (Doppler spectroscopy).

The two stars were identified originally as having short-orbit hot Jupiter planets, but 3.5 years of additional observations revealed that the planetary candidates' orbits were far longer than initially anticipated.

Six radial velocity measurements of the host star, collected using the HARPS instrument at Chile's La Silla Observatory.

The team used the radial velocity data to refine the parameters of HD 154672 b from what was published in its discovery paper a year earlier.

[1] Because HD 154672 b has such an eccentric orbit, the equilibrium temperature of the planet varies between 300 K and 600 K, which is significantly higher than that of Jupiter (124 K[6]).