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John Flamsteed numbered 54 stars for the constellation. [22] Located 36.7 light-years from Earth, Arcturus, or Alpha Boötis, is the brightest star in Boötes and the fourth-brightest star in the sky at an apparent magnitude of −0.05; [23] It is also the brightest star north of the celestial equator, just shading out Vega and Capella.
Arcturus is the brightest star in the constellation of Boötes. With an apparent visual magnitude of −0.05, Arcturus is the brightest star in the northern celestial hemisphere and the fourth-brightest star in the night sky, [14] after Sirius (−1.46 apparent magnitude), Canopus (−0.72) and α Centauri (combined
This is the list of notable stars in the constellation Boötes, sorted by decreasing brightness. The genitive for stars in this constellation is Boötis and the IAU abbreviation is Boo. Hence, η Boo is Eta Boötis.
Such multiple star systems are indicated by parentheses showing the individual magnitudes of component stars bright enough to make a detectable contribution. For example, the binary star system Alpha Centauri has the total or combined magnitude of −0.27, while its two component stars have magnitudes of +0.01 and +1.33.
Delta Boötis, Latinized from δ Boötis, is a double star in the northern constellation of Boötes, forming the easternmost member of the constellation's kite-shaped asterism of brighter stars. [14] Based upon parallax measurements, it is located at a distance of approximately 120.5 light-years (36.9 parsecs ) from the Earth . [ 1 ]
Epsilon Boötis (ε Boötis, abbreviated Epsilon Boo, ε Boo), officially named Izar (/ ˈ aɪ z ɑːr / EYE-zar), [16] is a binary star in the northern constellation of Boötes.The star system can be viewed with the unaided eye at night, but resolving the pair with a small telescope is challenging; an aperture of 76 mm (3.0 in) or greater is required.
Kappa Boötis (κ Boo, κ Boötis) is a double star in the constellation Boötes. It has the traditional name Asellus Tertius / ə ˈ s ɛ l ə s ˈ t ɜːr ʃ i ə s / ( Latin for "third donkey colt") [ 13 ] [ 14 ] and the Flamsteed designation 17 Boötis.
Iota Boötis (ι Boo, ι Boötis) is a member of a binary star system in the constellation Boötes, approximately 96 light-years from Earth. It has the traditional name Asellus Secundus / ə ˈ s ɛ l ə s s ɪ ˈ k ʌ n d ə s / (Latin for "second donkey colt") and the Flamsteed designation 21 Boötis. The companion is HD 234121, a K0 main ...