Acubens (meaning claws) is a magnitude 4.3 white star 174 light years away. It has an 11th magnitude companion visible in moderate telescopes. Altarf (b beta Cnc) is a magnitude 3.
Acubens (Alpha Cnc)
Altarf (Beta Cnc)
Asellus Borealis (Gamma Cnc)
Asellus Australis (Delta Cnc)
Tegmen (Zeta 1 Cnc) ...
Acubens = Alpha Cancri
Al Tarf = Beta Cancri
Asellus Borealis = Gamma Cancri
Tegmine = Zeta Cancri &
Iota Cnc = Iota Cancri
Kappa Cnc = Kappa Cancri
55 Cnc = 55 Cancri # ...
[1212] alpha Cancri or Acubens ("the claws") is a star system that lies 173 light-years away and has magnitude of 4.26. It is also sometimes known as Sertan ("the crab").
Named stars: Alpha Can (Acubens/Sertan), Beta Can (Al Tarf)
Info: Cancer is one of the 13 zodiacal constellations (that is, the Sun passes through it in the course of the year). This constellation contains the star cluster Praesepe (arab: Meleph) ...
Main named stars in Cancer: (Greek alphabet)
Acubens (α Cnc), Altarf (Tarf, β Cnc), Asellus Australis (δ Cnc), Asellus Borealis (γ Cnc).
Adjoining constellations: Canis Minor, Hydra, Gemini, Leo, Lynx ...
Normal A stars spin quickly, but most Am stars are known to be members of close binary systems in which the two stars slow each other down by tidal action. Familiar examples include Sirius and Acubens.
Related entries ...
At the center of the crab's shell is a huge open cluster, the Beehive cluster, also known as Praesepe (M44). The open cluster M67 is nearby. The brightest star in Cancer is Acubens (meaning claw); the second-brightest is Al Tarf (meaning tip).
Fittingly enough for such a minor character, it is the faintest of the zodiacal constellations, with no star brighter than fourth magnitude. The star Alpha Cancri is named Acubens, from the Arabic meaning ‘claw'.
 See also: Star, Constellation, Magnitude, Cancer, Constellations
  
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