Proxima Cen = alpha Cen C = GL 551 
        (really C?, Matthews & Gilmore 1993 	MNRAS, 261, L5) 
         = V645 Cen (a known flare star ) 
	Sp. T. = M5Ve			
	parallax = 0.7692 arcsec		
	L = luminosity of star = 0.0014sun			
	M(V)= absolute magnitude = 15.45
	R = star radius = 0.10sun =0.0004AU = 0.0003 arcsec
	M = mass of star	= 0.11sun (Kirkpatrick and McCarthy, 1994. AJ,107,  )		
	V = 11.22 (Walker 1981, MNRAS, 195, 1029)
	B-V = 1.95							
	Color Temp = 	2407 K,	S&T Sept 1992