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# Orbital inclination

Orbital inclination is the angle between a reference plane and the orbital plane or axis of direction of an object in orbit around another object. [1]

## Angle

In planar geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.

## Angular momentum

In physics, angular momentum (rarely, moment of momentum or rotational momentum) is the rotational analog of linear momentum.

## Asteroid

Asteroids are minor planets, especially those of the inner Solar System.

## Axial tilt

In astronomy, axial tilt, also known as obliquity, is the angle between an object's rotational axis and its orbital axis, or, equivalently, the angle between its equatorial plane and orbital plane.

## Azimuth

An azimuth (from Arabic al-sumūt, meaning "the directions") is an angular measurement in a spherical coordinate system.

## Beta angle

The beta angle (\boldsymbol) is a measurement that is used most notably in spaceflight.

## Brown dwarf

Brown dwarfs are substellar objects not massive enough to sustain hydrogen-1 fusion reactions in their cores, unlike main-sequence stars.

## Celestial mechanics

Celestial mechanics is the branch of astronomy that deals with the motions of celestial objects.

## Degree (angle)

A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of plane angle, representing of a full rotation.

## Doppler spectroscopy

Doppler spectroscopy (also known as the radial-velocity method, or colloquially, the wobble method) is an indirect method for finding extrasolar planets and brown dwarfs from radial-velocity measurements via observation of Doppler shifts in the spectrum of the planet's parent star.

## Dwarf planet

A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite.

## Ecliptic

The ecliptic is the apparent path of the Sun on the celestial sphere, and is the basis for the ecliptic coordinate system.

## Equator

An equator is the intersection of a sphere's surface with the plane perpendicular to the sphere's axis of rotation and midway between the poles.

## Eris (dwarf planet)

Eris (minor-planet designation 136199 Eris) is the most-massive and second-largest dwarf planet known in the Solar System.

## Exoplanet

An exoplanet or extrasolar planet is a planet that orbits a star other than the Sun.

## Gas giant

A gas giant is a giant planet composed mainly of hydrogen and helium.

## HD 33636

HD 33636 is a binary system located approximately 94 light-years away in Orion constellation.

## Horizontal coordinate system

The horizontal coordinate system is a celestial coordinate system that uses the observer's local horizon as the fundamental plane.

## Jupiter

Jupiter is the fifth planet from the Sun and the largest planet in the Solar System.

## Kepler orbit

In celestial mechanics, a Kepler orbit (or Keplerian orbit) describes the motion of an orbiting body as an ellipse, parabola, or hyperbola, which forms a two-dimensional orbital plane in three-dimensional space.

## Kozai mechanism

In celestial mechanics, the Kozai mechanism, or the Lidov–Kozai mechanism, is a perturbation of the orbit of a satellite by the gravity of another body orbiting farther out, causing libration (oscillation about a constant value) of the orbit's argument of pericenter.

## Magnetic dip

Magnetic dip, dip angle, or magnetic inclination is the angle made with the horizontal by the Earth's magnetic field lines.

## Methods of detecting exoplanets

Any planet has an extremely faint light source compared to its parent star.

## Natural satellite

A natural satellite or moon is a celestial body that orbits another body (a planet, dwarf planet, or small Solar System body), which is called its primary, and that is not artificial.

## Orbit

In physics, an orbit is the gravitationally curved path of an object around a point in space, for example the orbit of a planet around the center of a star system, such as the Solar System.

## Orbital elements

Orbital elements are the parameters required to uniquely identify a specific orbit.

## Orbital inclination change

Orbital inclination change is an orbital maneuver aimed at changing the inclination of an orbiting body's orbit.

## Orbital plane (astronomy)

The orbital plane of an object orbiting another is the geometrical plane in which the orbit lies.

## Plane of reference

In celestial mechanics, the plane of reference is the plane used to define orbital elements (positions).

## Planet

A planet is an astronomical object orbiting a star, brown dwarf, or stellar remnant that.

## Pluto

Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune.

## Red dwarf

A red dwarf is a small and relatively cool star on the main sequence, either late K or M spectral type.

Retrograde motion is motion in the direction opposite to the movement of something else and the contrary of direct or prograde motion.

## Rotation around a fixed axis

Rotation around a fixed axis is a special case of rotational motion.

## Satellite

In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit.

## Solar System

The Solar SystemCapitalization of the name varies.

## Spherical law of cosines

In spherical trigonometry, the law of cosines (also called the cosine rule for sides) is a theorem relating the sides and angles of spherical triangles, analogous to the ordinary law of cosines from plane trigonometry.

## Star system

A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction.

## Sun

The Sun (in Greek: Helios, in Latin: Sol) is the star at the center of the Solar System and is by far the most important source of energy for life on Earth.

## Terrestrial planet

A terrestrial planet, telluric planet or rocky planet is a planet that is composed primarily of silicate rocks or metals.

## 2 Pallas

Pallas, minor-planet designation 2 Pallas, is the second asteroid to have been discovered (after Ceres), and it is one of the largest asteroids in the Solar System.

## References

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