Table 1: System parameters for Algol ($=\beta $ Per).
Parameter Primary Secondary System
Mass (g) $7.54\times 10^{33}$ $1.64\times 10^{33}$  
Radius (cm) $2.15\times 10^{11}$ $2.29\times 10^{11}$  
Spectral type B8V K2III  
Luminosity (erg/s) $5.95\times 10^{35}$ $2.44\times 10^{34}$  
Rotation period (days) 2.8673 2.8673  
Orbital period (days)     2.8673
Separation (cm)     $1.02\times 10^{12}$
Distance (pc)     28
Inclination (degrees)     82.5


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