**Table 5:** Calibrations of fundamental parameters by spectral type for Galactic B supergiants, based on this work and that of Crowther et al. (2006).
Sp. type	$T_{\rm eff}$	$\log\ (L/\mbox{$L_{\odot}$ })$	R_*( $R_{\odot }$ )	log g	M_*( $M_{\odot }$ )
B0 Ia	28.1	5.60	26.9	2.99	25
B0 Ib	29.7	5.66	23.8	3.24	37
B0.2 Ia	26.7	5.62	30.4	3.04	36
B0.2 Ib	28.5	5.65	27.8	3.23	49
B0.5 Ia	24.7	5.58	33.8	2.90	33
B0.5 Ib	25.4	5.58	32.2	3.09	47
B0.7 Ia	23.6	5.53	35.1	2.72	23
B0.7 Ib	24.4	5.51	33.9	2.93	37
B1 Ia	22.0	5.44	36.5	2.41	12
B1 Ib	21.7	5.38	34.9	2.67	22
B1.5 Ia	19.9	5.44	44.5	2.41	18
B1.5 Ib	19.3	5.29	39.7	2.50	19
B2 Ia	18.3	5.41	51.0	2.32	19
B2 Ib	18.1	5.27	44.4	2.46	21
B2.5 Ia	17.2	5.39	56.5	2.24	19
B2.5 Ib	17.6	5.25	46.2	2.43	22
B3 Ia	16.4	5.37	60.4	2.16	19
B3 Ib	17.5	5.23	45.5	2.39	19
B4 Ia	15.8	5.34	63.5	2.06	16
B4 Ib	17.4	5.18	43.2	2.27	13
B5 Ia	15.7	5.33	63.0	2.03	15
B5 Ib	15.2	5.09	51.7	2.11	13

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