How far is Proxima Centauri from Alpha Centauri?

Alpha and Proxima Centauri are members of a three-star system that includes a third member, Alpha Centauri C. 

Alpha Centauri    A      G2 V    
Alpha Centauri    B      K5 V
Proxima Centauri         M5 V
Alpha Cen A and B have an orbital period of 79.9 years and a separation of 17.6 seconds of arc or 28.1 AU Alpha Cen A and Proxima Centauri have a separation of 7849 arcseconds or 12,560 AU.
Copyright 1997 Dr. Sten Odenwald
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