WTS-1 is a Sun-like F-type star (about 1.20 solar masses, 6,250 K, 1.15 solar radii), 2,346 light-years from Earth. WTS-1 b is a 4.01-Jupiter-mass companion, with an orbital period of 3.4 days, at 0.047 AU from its star, and an equilibrium temperature near 1,500 K, on an eccentric orbit (e ≈ 0.10), discovered in 2012 via transit. The inner world is a hot Jupiter — a gas giant hugging its star at a fraction of Mercury's distance — a class that forced astronomers to rethink how giant planets form and migrate inward.