11 relations: Apsis, Argument of periapsis, Celestial mechanics, Longitude, Longitude of the ascending node, Mean longitude, Orbit, Orbital inclination, Orbital state vectors, Plane of reference, True longitude.
An apsis (ἁψίς; plural apsides, Greek: ἁψῖδες) is an extreme point in the orbit of an object.
The argument of periapsis (also called argument of perifocus or argument of pericenter), symbolized as ω, is one of the orbital elements of an orbiting body.
Celestial mechanics is the branch of astronomy that deals with the motions of celestial objects.
Longitude, is a geographic coordinate that specifies the east-west position of a point on the Earth's surface.
The longitude of the ascending node (☊ or Ω) is one of the orbital elements used to specify the orbit of an object in space.
Mean longitude is the ecliptic longitude at which an orbiting body could be found if its orbit were circular and free of perturbations.
In physics, an orbit is the gravitationally curved trajectory of an object, such as the trajectory of a planet around a star or a natural satellite around a planet.
Orbital inclination measures the tilt of an object's orbit around a celestial body.
In astrodynamics and celestial dynamics, the orbital state vectors (sometimes state vectors) of an orbit are cartesian vectors of position (\mathbf) and velocity (\mathbf) that together with their time (epoch) (t\) uniquely determine the trajectory of the orbiting body in space.
In celestial mechanics, the plane of reference (or reference plane) is the plane used to define orbital elements (positions).
In celestial mechanics true longitude is the ecliptic longitude at which an orbiting body could actually be found if its inclination were zero.