H-R Diagram Coordinates to Stellar Properties From Coordinates From Properties Log(Luminosity/L☉): Log(Effective Temperature/K): Calculate Stellar Properties Stellar Properties Download as PDF Stellar Radius (R☉): Stellar Mass (M☉): Spectral Type: O B A F G K M Calculate H-R Coordinates H-R Diagram Coordinates Download as PDF Reference Values: Sun (G2V): L☉ = 3.828×1026 W, Teff = 5778 K, R☉ = 6.957×108 m, M☉ = 1.988×1030 kg