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Its star is a K1V-type star of apparent magnitude 12.7, far below naked-eye visibility, and smaller than the Sun at 0.78 M ☉ and 0.765 R ☉. [64] HD 131496 is also encircled by one planet, HD 131496 b. The star is of type K0 and is located 110 parsecs from Earth; it appears at a visual magnitude of 7.96.
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.
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.
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 magnitude of −0.27).
Theta Boötis, Latinized from θ Boötis, is a star in the northern constellation of Boötes the herdsman, forming a corner of the upraised left hand of this asterism. [13] It has the traditional name Asellus Primus (/ ə ˈ s ɛ l ə s ˈ p r aɪ m ə s /; Latin for "first donkey colt") [13] and the Flamsteed designation 23 Boötis.
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.
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]
Beta Boötis, Latinized from β Boötis, and also named Nekkar / ˈ n ɛ k ɑːr /, [10] is a star in the northern constellation of Boötes. It has an apparent visual magnitude of 3.5, [2] making it one of the brighter members of the constellation. In the modern constellation, it marks the head of Boötes the herdsman. [11]
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