1. arcturus - Noun
2. Arcturus - Proper noun
A fixed star of the first magnitude in the constellation Bootes.
Source: Webster's dictionaryArcturus was part of the most prominent of these, variously designated as the celestial king's throne (Tian Wang) or the Blue Dragon's horn (Daijiao); the name Daijiao, meaning "great horn", is more common. Source: Internet
Arcturus was given such importance in Chinese celestial mythology because of its status marking the beginning of the lunar calendar, as well as its status as the brightest star in the northern night sky. Source: Internet
Arcturus is on the top left-hand corner and the Quadrantids radiant can be seen between these two stars. Source: Internet
However, Germanicus Caesar deviated from this tradition by placing Arcturus "where his garment is fastened by a knot".sfn Notable features The constellation Bootes as it can be seen by the naked eye. Source: Internet
Arcturus is a type K0 III orange giant star, with an absolute magnitude of −0.30. Source: Internet
In a 6 cm telescope, he observed 433 meteors in a field of view near Arcturus with a diameter of less than 1°. Source: Internet