A body traveling along hyperbolic trajectory will attain in infinity an orbital velocity called hyperbolic excess velocity (v∞).
The formula for Hyperbolic excess velocity is given as,
v∞ = √〈µ / -a〉
v∞ = Hyperbolic excess velocity
µ = is the standard gravitational parameter
a = the length of the semi-major axis (a > 0 for ellipses, a = ∞ or 1/a = 0 for parabolas,
and a < 0 for hyperbolas)