WASP-49 is a binary star system about 636 light-years (195 parsecs) away in the constellation Lepus.
[5] In 2012, one exoplanet, designated WASP-49b, was discovered around the primary star by a team led by Monika Lendl.
[8] This is a hot Jupiter with an equilibrium temperature of 1369±39 K.[8] In 2017, WASP-49b was found to have an extensive sodium envelope.
[3] A study in 2019 using data from the Hubble Space Telescope in near-UV found clear absorption features caused by metals, including magnesium and iron.
The gaseous magnesium and iron is not gravitationally bound to the planet, but could be magnetically confined to it.