Castor Moving Group

The Castor - motion cluster is a star association, which consists of a number of stars, all of which have approximately the same speed and a common origin come from. The stars that were identified as part of the group, are Castor, Fomalhaut, Vega, α Cephei and α Librae, all of which have a similar age.

Findings and Components

The Castor - motion pile was first proposed by JP Anosova and VV Orlov in 1990. Anosova and Orlov beat the original 15 members present as part of the group. A recent study of B. Barrado y Navascues recognizes 16 members, but also points to persisting uncertainties.

Stars of the Castor moving cluster


  • JP Anosova, VV Orlov: The dynamical evolution of the nearby multiple stellar systems ADS 48, ADS 6175 ( Alpha Geminorum = Castor ), Alpha Centauri, and ADS 9909 (Xi Scorpii ). In: Astronomy & Astrophysics. 252, December 1991, pp. 123-126. Retrieved on 11 January 2007.
  • D. Barrado y Navascues: The Castor Moving Group: The age of Fomalhaut and Vega. In: Astronomy & Astrophysics. 339, 1998, pp. 831-839. Retrieved on 11 January 2007.
  • Star clusters