WASP-78
WASP-78, is a single F-type main-sequence star about 2350 light-years away. It is likely to be younger than the Sun at 3.4 billion years. WASP-78 is depleted in heavy elements, having a 45% concentration of iron compared to the Sun.
Planetary system
In 2012 a transiting hot Jupiter planet b was detected on a circular orbit. The planetary equilibrium temperature is 2350 K, while the nightside temperature measured in 2019 is 2200 K. The dayside planetary temperature measured in 2020 is.A survey in 2016 measured a Rossiter-McLaughlin effect and found the planetary orbit is well aligned with the equatorial plane of the star, misalignment equal to −6.4° The planet cannot have formed in its current orbit and has likely undergone in the past a migration from the initial highly eccentric orbit.