dsgp4.util.from_cartesian_to_keplerian

dsgp4.util.from_cartesian_to_keplerian(r_vec, v_vec, mu)

This function converts the provided state from Cartesian to Keplerian elements.

Parameters:

r_vec (np.array): position vector in Cartesian coordinates v_vec (np.array): velocity vector in Cartesian coordinates mu (float): gravitational parameter of the central body

Returns:

np.array: array of Keplerian elements: (a, e, i, Omega, omega, M)

(i.e., semi-major axis, eccentricity, inclination, right ascension of ascending node, argument of perigee, mean anomaly). All the angles are in radians, eccentricity is unitless and semi-major axis is in SI.