Typical Characteristics of Spectral Types

Type	MV	(B-V)0	Teff	Bol. Corr.
Main Sequence
O5V	-5.7	-0.33	42,000	-4.40
O9V	-4.5	-0.31	34,000	-3.33
B0V	-4.0	-0.30	30,000	-3.16
B2V	-2.45	-0.24	20,900	-2.35
B5V	-1.2	-0.17	15,200	-1.46
B8V	-0.25	-0.11	11,400	-0.80
A0V	+0.65	-0.02	9,790	-0.30
A2V	+1.3	+0.05	9,000	-0.20
A5V	+1.95	+0.15	8,180	-0.15
F0V	+2.7	+0.30	7,300	-0.09
F2V	+3.6	+0.35	7,000	-0.11
F5V	+3.5	+0.44	6,650	-0.14
F8V	+4.0	+0.52	6,250	-0.16
G0V	+4.4	+0.58	5,940	-0.18
G2V	+4.7	+0.63	5,790	-0.20
G5V	+5.1	+0.68	5,560	-0.21
G8V	+5.5	+0.74	5,310	-0.40
K0V	+5.9	+0.81	5,150	-0.31
K2V	+6.4	+0.91	4,830	-0.42
K5V	+7.35	+1.15	4,410	-0.72
M0V	+8.8	+1.40	3,840	-1.38
M2V	+9.9	+1.49	3,520	-1.89
M5V	+12.3	+1.64	3,170	-2.73
Giants*
G5III	+0.9	+0.86	5,050	-0.34
G8III	+0.8	+0.94	4,800	-0.42
K0III	+0.7	+1.00	4,660	-0.50
K2III	+0.5	+1.16	4,390	-0.61
K5III	-0.2	+1.50	4,050	-1.02
M0III	-0.4	+1.56	3,690	-1.25
M2III	-0.6	+1.60	3,540	-1.62
M5III	-0.3	+1.63	3,380	-2.48
Supergiants
O9I	-6.5	-0.27	32,000	-3.18
B2I	-6.4	-0.17	17,600	-1.58
B5I	-6.2	-0.10	13,600	-0.95
B8I	-6.2	-0.03	11,100	-0.66
A0I	-6.3	-0.01	9,980	-0.41
A2I	-6.5	+0.03	9,380	-0.28
A5I	-6.6	+0.09	8,610	-0.13
F0I	-6.6	+0.17	7,460	-0.01
F2I	-6.6	+0.23	7,030	-0.00
F5I	-6.6	+0.32	6,370	-0.03
F8I	-6.5	+0.56	5,750	-0.09
G0I	-6.4	+0.76	5,370	-0.15
G2I	-6.3	+0.87	5,190	-0.21
G5I	-6.2	+1.02	4,930	-0.33
G8I	-6.1	+1.14	4,700	-0.42
K0I	-6.0	+1.25	4,550	-0.50
K2I	-5.9	+1.36	4,310	-0.61
K5I	-5.8	+1.60	3,990	-1.01
M0I	-5.6	+1.67	3,620	-1.29
M2I	-5.6	+1.71	3,370	-1.62
M5I	-5.6	+1.80	2,880	-3.47

*For stars hotter than G5III, use the Bolometric Corrections for the corresponding spectral type Main Sequence star.