Stellar Temperatures


0Hypergiant
ISupergiant
IIBright Giant
IIIGiant
IVSubgiant
VDwarf (main sequence)
VISubdwarf
VIIWhite dwarf

Stellar Temperatures (K)
IIIIIIIVV
W 80000
O0
O1
O2
O3
O4 48000
O5 44500
O6 41000
O7 38000
O8 35800
O932500 33000
O9.532500 31900
B026000 30000
B0.526000 27000
B120700 24200
B217800 22100
B315600 18800
B413900 17200
B513400 16400
B612700 15400
B712000 14500
B811200 13400
B910500 12400
A09730 10800
A19230
A29080
A3 9730
A4 9175?
A58510 8620
A6 8405?
A7 8190
A8
A9
F07700 7240
F1 7085?
F27170 6930
F3
F4
F56640 6540
F6
F7 6240
F86100 6200
F9 6060?
G05510 5910 5920
G1 5850?
G2 5780
G34980
G4 5190 5740
G5 5010 5610
G6
G7
G84590 4870 5490
G9 5365?
K04420 4720 5240
K14330 4580 5010?
K24260 4460 4780
K34130ab 4210
K4 4010 4560
K53850ab 3780 4340
K6
K7 4410
K8
K9
M03650ab 3660 3920
M13550ab 3600 3680
M23450ab 3500 3500
M33200ab 3300 3360
M42980ab 3100 3230
M5 2950 3120
M6 2800 2970?
M7 2815?
M8 2660
M9 2510
E0 1800
E1 1700?
E2 1600
E3 1450?
E4 1300
E5 1150?
E6 1000
E7 900?
E8 800
E9 750?
J0 700
J1 650?
J2 600
J3 500?
J4 400
J5 300?
J6 200?
J7 100
J8 80
J9 50

compcomposite spectrum
eemission lines
fNIII and HeII emission (O stars)
kinterstellar lines
menhanced metallic features
nbroad absorption features
nnvery broad absorption features
nebnebulous features present
pother peculiarities
svery narrow absorption lines
shshell star
vvariable spectral features
varvariable spectral features
wlweak features
:uncertainty