Characteristics of Hercules

The Five Immortals is a big constellation in the starry sky in summer night, and it is also one of several big constellations all day. Although the scope of the five risks is large, it is a pity that the stars in the constellation are not very bright, and they are all composed of 3 stars and 4 stars. 1934, a nova burst was found in the constellation Ursa, with the brightness reaching 1, but it has become a dark star. 1960 and 1963 have new star bursts, but the brightness is not as bright as 1934.

A is a binary star and its main star is an irregular variable star. η, ζ, β, δ, ε, π (Chinese names Tianji Zengyi, Tianji Eryi, Weishi, Tianji Sanyi, Nvchuangyi) are arranged into a quadrilateral, which constitutes the main feature of this constellation.