# motion_since_birth¶

gammapy.utils.coordinates.motion_since_birth(v, age, theta, phi)[source]

Compute motion of a object with given velocity, direction and age.

Parameters: v : Quantity Absolute value of the velocity age : Quantity Age of the source. theta : Quantity Angular direction of the velocity. phi : Quantity Angular direction of the velocity. dx : Quantity Displacement in x direction dy : Quantity Displacement in y direction dz : Quantity Displacement in z direction vx : Quantity Velocity in x direction vy : Quantity Velocity in y direction vz : Quantity Velocity in z direction