A fixed star of the first magnitude in the constellation Boötes.

the 4th brightest star and the brightest star in the constellation Bootes; 36 light-years from Earth

Arcturus (α Boo / α Boötis / Alpha Boötis) is the brightest star in the constellation Boötes, and the third brightest star in the night sky, with a visual magnitude of −0.05, after Sirius and Canopus. Because Alpha Centauri consists of two bright stars which are closer together than the limit of resolution of the human eye, Alpha Centauri actually appears brighter than Arcturus to the naked eye. It is the second brightest star visible from northern latitudes and the brightest star in the northern celestial hemisphere.

Arcturus ~ The Curse and Loss of Divinity ~ is a Korean RPG game co-developed by Sonnori and Gravity Corp. Its game system served as a backbone for the creation of the famous MMORPG Ragnarok Online.