Moment Constants for Brownian Affine Approximation

We evaluate moment constants for the times during which Brownian motion admits uniform approximation by an unrestricted affine function or by a line through the origin. The first four moments are rational linear combinations of $1$ and $ζ(2j+1)/π^{2j}$, $1\le j\le4$; the means are $40ζ(3)/π^2-4/3$ a