Apoapsis	Hamilton's Theorem	Orbital Coordinates
Argument of Pericenter	Herget's Method	Orbital Elements
Ascending Node	Herrick and Liu Method	Orbital Mechanics
Bertrand's Theorem	High Earth Orbit	Orbital Perturbation
Binet's Equation	Hodograph	Orbital Precession
Bonnet's Theorem	Hohmann Transfer Orbit	Orbital Reference System
Bruns' Theorem	Hyperbolic Orbit	Orbital Resonance
c3	Impact Parameter	Orbital Stability
Cassini Laws	Inclination	Osculating Orbital Elemen...
Cassini States	Jacobi Integral	Painlevé Problem
Celestial to Equatorial C...	Kepler's First Law	Parabolic Orbit
Celestial to Equatorial C...	Kepler's Laws	Periapsis
Celestial Mechanics	Kepler Problem	Physical Libration
Central Force	Kepler's Second Law	Planar Orbit
Central Orbit	Kepler's Third Law	Planetary Precession
Circular Orbit	Lagrange's Planetary Equa...	Poincaré Elements
Clairaut's Equation	Lagrange Points	Poincaré's Problem
Clarke Orbit	Lambert's Theorem	Poincaré's Theorem
Closed Orbit	Laplace's Method	Polar Orbit
Coorbital Satellites	Laplace Plane	Pomega
Copenhagen Problem	Laplace Resonance	Precession
Cotes' Spiral Orbit	Laplace-Runge-Lenz Vector	Precession of the Equinox...
de Sitter Effect	Libration in Latitude	q
Descending Node	Libration in Longitude	Reduced Mass
Disturbing Function	Line of Apsides	Reference Plane
Diurnal Libration	Line of Nodes	Relativistic Precession
Eccentric Anomaly	Longitude at Epoch	Relativistic Two-Body Pro...
Eccentricity	Longitude of Pericenter	Restricted Three-Body Pro...
Eccentricity Perturbations	Longitude of the Ascendin...	Retrograde Orbit
Elliptical Orbit	Low Earth Orbit	Rings
Equation of Center	Many-Body Problem	Roche Limit
Escape Velocity	Mean Anomaly	Roche Lobe
Euler's Two-Point Orbit D...	Mean Longitude	Satellite Resonances
F- and G-Functions	Mean Longitude at Epoch	Semilatus Rectum
f- and g-Series	Mean Motion	Specific Angular Momentum
Gauss-Encke-Merton Method	Molniya Orbit	Stumpff Function
Gauss's Principle of Leas...	Mu	Sun-Synchronous Orbit
Gaussian Gravitational Co...	n-Body Problem	Three-Body Problem
Gaussian Vectors	Nonsynchronous Rotation	Time of Pericenter Passage
Geostationary Orbit	Nutation	Tisserand Parameter
Geostationary Transfer Or...	Obliquity	Two-Body Problem
Geosynchronous Orbit	Obliquity-Induced Precess...	Vis-Viva Equation
Gravitational Moment	Orbit	Yarkovsky Effect
Gravity Assist	Orbit Determination