Supergiant
Hertzsprung–Russell diagram
L
T
Subdwarfs
Subgiants
Giants
Blue giants
Bright giants
Red supergiant
Hypergiants
Supergiants are among the most massive and most luminous stars. Supergiant stars occupy the top region of the Hertzsprung–Russell diagram, with absolute visual magnitudes between about −3 and −8. The temperatures of supergiant stars range from about 3,400 K to over 20,000 K.