 Since the inclination is known by transit observation, the true mass is known.The secondary eclipse where the planet passes behind the star was detected by the Spitzer space telescope leading to the discovery that the planet has inefficient heat transfer from its day to night side.The study in 2012, utilizing a Rossiter–McLaughlin effect, have determined the planetary orbit is probably aligned with the rotational axis of the star, misalignment equal to -4.9°.