Properties of Stars

 (adapted from Allen, Astrophysical Quantities, 3rd. ed 1973)
Main Sequence Luminosity Class V
Spectral Class
R/Rsun
M/Msun
T eff
Mv
B-V
U-B
O5
18
40
40000
-5.8
-0.35
-1.15
B0
7.4
18
28000
-4.1
-0.31
-1.06
B5
3.8
6.5
15000
-1.1
-0.16
-0.55
A0
2.5
3.2
9900
0.7
0
-0.02
A5
1.7
2.1
8500
2
0.13
0.1
F0
1.3
1.7
7400
2.6
0.27
0.07
F5
1.2
1.3
6580
3.4
0.42
0.03
G0
1.1
1.1
6030
4.4
0.58
0.05
G5
0.93
0.93
5520
5.1
0.7
0.19
K0
0.85
0.78
4900
5.9
0.89
0.47
K5
0.74
0.7
4130
7.3
1.18
1.1
M0
0.63
0.45
3480
9
1.45
1.28
M5
0.32
0.21
2800
11.8
1.63
1.2
 


Giants Luminosity Class III
Spectral Class R/Rsun M/Msun T eff Mv B-V
U-B
G0
6.3
2.5
5600
1.1
0.65
0.3
G5
10
3.2
5000
0.7
0.85
0.53
K0
16
4
4500
0.5
1.07
0.9
K5
25
5
3800
-0.2
1.41
1.5
M0
*
6.3
3200
-0.4
1.6
1.8
M5
*
*
*
-0.8
1.85
2.3

 
Supergiants Luminosity Class I
Spectral Class
R/Rsun
M/Msun
T eff
Mv
B-V
U-B
B0
20
50
30000
-6.4
-0.25
-1.2
A0
40
16
12000
-6.2
0
-.03
F0
63
12
7000
-6
0.25
0.25
G0
100
10
5700
-6
0.7
0.6
G5
125
12
4850
-6
1.06
0.87
K0
200
13
4100
-5
1.39
1.34
K5
400
16
3500
-5
1.7
1.7
M0
500
16
*
-5
1.94
1.7
M5
* * * * 2.14 *