Table of Main-Sequence Star Data

color	spectral class	example star	temperature K	luminosity	mass	radius
blue	O9.5	Orionis C	33,000	30,000	18.0	5.90
bluish	B0	Becrux	30,000	16,000	16.0	5.70
bluish	B2	Spica	22,000	8,300	10.5	5.10
bluish	B5	Achernar	15,000	750	5.40	3.70
bluish	B8	Rigel	12,500	130	3.50	2.70
blue-white	A0	Sirius A	9,500	63	2.60	2.30
blue-white	A2	Fomalhaut	9,000	40	2.20	2.00
blue-white	A5	Altair	8,700	24	1.90	1.80
white	F0	Polaris A	7,400	9.0	1.60	1.50
white	F2	Eta Scorpii	7,100	6.3	1.50	1.30
white	F5	Procyon A	6,400	4.0	1.35	1.20
yellow-white	G0	Alpha Centauri A	5,900	1.45	1.08	1.05
yellow-white	G2	The Sun	5,800	1.00	1.00	1.00
yellow-white	G5	Mu Cassiopeiae	5,600	0.70	0.95	0.91
yellow-white	G8	Tau Ceti	5,300	0.44	0.85	0.87
orange	K0	Pollux	5,100	0.36	0.83	0.83
orange	K2	Epsilon Eridani	4,830	0.28	0.78	0.79
orange	K5	Alpha Centauri B	4,370	0.18	0.68	0.74
red dwarfs	M0	.	3,670	0.075	0.47	0.63
red dwarfs	M2	Lalande 21185	3,400	0.03	0.33	0.36
red dwarfs	M4	Ross 128	3,200	0.0005	0.20	0.21
red dwarfs	M6	Wolf 359	3,000	0.0002	0.10	0.12

Not all of the types of stars in the universe belong in the main sequence.
Other types include white dwarfs, long-period variables, and the red supergiants.
Temperatures are in Kelvins. Sizes of stars vary widely within their spectral classes.
The class averages of luminosity, mass, and radius are all relative to those of the Sun.

Table of the Earth's Nearest Stars
Scale Model of the Solar System
Relative Sizes
The Gordon Speer Home Page

Updated March 22, 2012

Please send your comments: email