Arcturus (also called Svati or very rarely Arktur) is an orange giant star in the constellation Boötes. it is the brightest star in the Constellation Boötes as well as the entire northern hemisphere, and the fourth brightest star In the night sky. It has exhausted the supply of hydrogen in its core, thus moving off the main sequence. It is around 170 times more luminous than the Sun.
Astronomical data
Radius (in Solar Radii): 25.4 R☉
Diameter (in Kilometers): 35,356,800 km
Mass (in Solar masses): 1.08 M☉
Distance (in Light Years): 36.7 ly
Spectral type: K1.5 III (Orange)