Kepler-1771 is a Sun-like G-type star (about 0.94 solar masses, 5,661 K, 0.93 solar radii), 566 light-years from Earth. Kepler-1771 b is a planet with 4.1 Earth radii, with an orbital period of 88.6 days, discovered in 2021 via transit. The planet was found when it crossed the face of its star, producing periodic dips in brightness that reveal its size and orbital period to space-based photometry. At roughly 566 light-years, Kepler-1771 lies far beyond the nearest stars yet remains reachable to large survey telescopes.