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Regulus is the brightest object in the constellation Leo and one of the brightest stars in the night sky. It has the Bayer designation designated α Leonis, which is Latinized to Alpha Leonis, and abbreviated Alpha Leo or α Leo. Regulus appears singular, but is actually a quadruple star system composed of four stars that are organized into two ...
Each IAU constellation has an official three-letter abbreviation based on the genitive form of the constellation name. As the genitive is similar to the base name, the majority of the abbreviations are just the first three letters of the constellation name: Ori for Orion/Orionis, Ara for Ara/Arae, and Com for Coma Berenices/Comae Berenices.
Regulus: α Leo 79 B8 IVn Northern 22 1.50 Adhara: ε CMa 430 B2 II Southern 23 1.58 (1.93 + 2.97) Castor: α Gem 51 A1 V, Am Northern 24 1.62 Shaula: λ Sco 570 B2 IV Southern 25 1.64 Gacrux: γ Cru 89 M3.5 III Southern 26 1.64 Bellatrix: γ Ori 250 B2 III Northern 27 1.65 Elnath: β Tau/γ Aur 130 B7 III Northern 28 1.69 Miaplacidus: β Car 110
Regulus, designated Alpha Leonis, is a blue-white main-sequence star of magnitude 1.34, 77.5 light-years from Earth. It is a double star divisible in binoculars, with a secondary of magnitude 7.7. Its traditional name (Regulus) means "the little king". Beta Leonis, called Denebola, is at the opposite end of the constellation to Regulus. It is a ...
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Hydra is the largest constellation, covering more than 1 ⁄ 32 of the night sky and 19 times the area of Crux, the smallest constellation. The International Astronomical Union (IAU) designates 88 constellations of stars. In the table below, they are ranked by the solid angle that they subtend in the sky, measured in square degrees and ...
Regulus was seen as the main star because it was in the constellation of Leo, giving it the power of the lion, signifying the strength of kings with large implications. [5] The constellations of the royal stars were said to be fixed because their positions were close to the four fixed points of the sun's path. [5]
With a distance of 36 light years from Earth, and an apparent magnitude of 2.14, [25] it is the third brightest star in the constellation and the 62nd in the night sky. [14] This star has often taken the place of Regulus in the Spring Triangle. While Regulus has a higher magnitude, Denebola makes the triangle more equilateral in appearance.