Arcturus

Arcturus is the brightest star in the constellation Boötes and the fourth brightest star in the sky. It is a K1.5 III red giant with an absolute magnitude of -0.30. Its mass is slightly more than the Sun's, suggesting it is a good example of a later phase in the evolution (the red-giant branch) of stars much like the Sun. Characteristics:

• Boötes - constellation.
• 14h15m39.7s - right ascension.
• +19deg10m56s - declination.
• -0.05 - apparent magnitude (V).
• 36.7 ly - distance.
• K1.5 III - spectral type.
• 1.08 - mass(solar).
• 170 - luminosity(solar).
• 25.4 - radius(solar).
• +1.23 - B-V color index.