Regulus' constellation is LEO, which is a Latin word meaning 'LION'. It is one of the 88 modern constellations and is located in the northern celestial hemisphere. It is the fifth largest constellation in the sky and is bordered by Cancer to the west, Virgo to the east, and Hydra to the south. It is also bordered by Ursa Major to the north and Coma Berenices to the northeast. Regulus, the brightest star in LEO, is located at the heart of the constellation.