3.2 Diameters

µ = 27.68 + 5[log D(n) - log D(0)], where D(0) is the ``face-on'' diameter (in minutes of arc) in the standard system of the Reference Catalogue and log D(n) = ₀ - 0.10n (D in kpc, n 5), with

0 = 1.10	1.15	1.20	1.25	1.30	1.35	1.30	1.20
T = E	L	S0,1	S2,3	S4,5	S6,7	S8,9	I9.