WASP-84, also known as BD+02 2056, is a G-type main-sequence star 327 light-years (100 parsecs) away in the constellation Hydra.
Its surface temperature is 5350±31 K and is slightly enriched in heavy elements compared to the Sun, with a metallicity Fe/H index of 0.05±0.02.
[3] The star appears to have an anomalously small radius, which can be explained by the unusually high helium fraction or by it being very young.
The planetary orbit is well aligned with the equatorial plane of the star, misalignment being equal to 0.3±1.7°.
This appears to be a dense rocky planet despite its high mass, comparable to Uranus.