Type M star

Type M stars include the red dwarfs and red giants. They are only very weakly luminous, red, with temperatures around 2,500 to 3,000 K. Their spectra are characterised by many strong metallic lines and also wide titanium oxide bands. Antares and Betelgeuse are known examples.

Statistics

Spectral type	Luminosity	Temperature	Mass	Radius	Density (gm/cm3)
M0	0.1	3,500°	0.5	0.6	2.5
M5	0.01	2,800°	0.2	0.3	10.0
M8	0.001	2,800°	0.2	0.1	63

See also

• List of Type M stars
• Type S star