Bodies

body_declination(T, ::Val{id})

Interface to compute the declination of the north pole of a body identified by id.

body_pole(T, ::Val{id})

Interface to compute the north pole direction of the id body.

body_prime_meridian(T, ::Val{id})

Interface to compute the prime meridian angle of a body identified by id.

body_right_ascension(T, ::Val{id})

Interface to compute the right ascension of the north pole of a body identified by id.

body_rotational_elements(T, ::Val{id})

Interface to compute the rotational elements of a body with ID id. Rotational elements includes α, δ and W that identifies the north pole of the body and its prime meridian.

The north pole is that pole of rotation that lies on the north side of the invariable plane of the solar system. Its direction is specified by the values of its right ascension α, declination δ .

The location of the prime meridian is then given by W, which is a rotation in the body equator of date.