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The traditional name of the β Scorpii system has been rendered Akrab and Elakrab, derived (like Acrab) from Arabic: العقرب al-ʿaqrab ('the scorpion'). / ˈ eɪ k r æ b / Crux: α Crucis Aa: Acrux "Acrux" is a modern contraction of the Bayer designation, coined in the 19th century, but which entered into common use only by the mid-20th ...
Alpha 2 Capricorni (α 2 Capricorni), or Algedi / æ l ˈ dʒ iː d i /, [9] [10] is a triple star system [11] in the southern constellation of Capricornus. It is visible to the naked eye with an apparent visual magnitude of +3.57. [ 2 ]
A multiple star system consists of two or more stars that appear from Earth to be close to one another in the sky. [dubious – discuss] This may result from the stars actually being physically close and gravitationally bound to each other, in which case it is a physical multiple star, or this closeness may be merely apparent, in which case it is an optical multiple star [a] Physical multiple ...
The earliest naming system which is still popular is the Bayer designation using the name of constellations to identify the stars within them. [1] The IAU is the only internationally recognized authority for assigning astronomical designations to celestial objects and surface features on them. [2]
This category contains articles about star systems, which are groups of two or more gravitationally-bound stars in a region usually smaller than one light-year. Star clusters (groups of many more stars that occupy a much larger region) are listed in Category:Star clusters .
Theta Serpentis (θ Serpentis, abbreviated Theta Ser, θ Ser) is a triple star system in the constellation of Serpens.. It consists of a binary pair designated Theta Serpentis AB and whose two components are designated Theta 1 Serpentis or Theta Serpentis A (officially named Alya / ˈ æ l i ə /, the traditional name for the entire system) [8] [9] and Theta 2 Serpentis or Theta Serpentis B ...
19 Tauri is the system's Flamsteed designation.It also bears the little-used Bayer designation q Tauri.The designations of the two constituents as 19 Tauri A and B, and those of A's components - 19 Tauri Aa and Ab - derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).
Iota Cassiopeiae is known to be a quintuple star system. The brightest star system, ι Cassiopeiae A, contains a white-colored A-type main-sequence star with a mean apparent magnitude of +4.61. [1] The primary is itself a tighter binary star system. The two stars were resolved by adaptive optics.