HAT-P-6b is a transiting extrasolar planet discovered by Noyes et al. on October 15, 2007.

[2] It is located approximately 910 light-years away[4] in the constellation of Andromeda, orbiting the star HAT-P-6.

The name was selected in the NameExoWorlds campaign by the Netherlands, during the 100th anniversary of the IAU, after Rembrandt's painting The Night Watch.

[5][6] The sky projected angle between stellar and orbital axis is roughly 166°, making it one of the few planets that is in a retrograde orbit around its parent star.

[3] Observations made by Spitzer Space Telescope shows that the planet atmosphere has a weak temperature inversion, or no inversion at all, depending on how strong is the stellar chromospheric activity.