Parabolic velocity is the velocity which an object at a given point would require in order to describe a parabola about the center of attraction. This is also the escape velocity since it is the upper limit of velocity on a closed curve. It is obtained by multiplying the velocity of an object moving in a circular orbit by the square root of 2 (approx. 1.414). For example, if the Earth's mean velocity around the Sun of 29.8 kilometers per second. (18.5 miles per second), in a near circular orbit, were increased to 42 kilometers per second. (26 miles per second), the Earth would move to a parabolic path and escape from the solar system.