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Altjira

Altjira is a Kuiper Belt object, a large rock that orbits round outside the orbit of Neptune. It has been categorised as a object. It has an alternative name which is 2001 UQ18.

Altjira was discovered on 2001-10-20 by Deep Ecliptic Survey.

The absolute magnitude of the object is 5.7 which is the brightness of the object. A higher absolute magnitude means that the object is faint whereas a very low number means it is very bright.

The Aphelion of the object is 46.905 A.U. which is the point in the orbit that is furthest from the object that it is orbit. At this point, it will then return back to the orbit target. The Perihelion of the object is 41.125 A.U. which is the point in the orbit that is closest to the object that it is orbit around. The Longitude of Ascending Node of the object is 1.8 degrees. It is the angle between the Reference Direction and the Ascending Node. It is normally represented by the greek letter Ω. The ascending node is the point in which the object passes north. The descending node is the southern.The Argument of Perihelion is 296.3. It is the angle along the orbit of a planet or other Solar System object as measured from the ascending node (analogous to right ascension and longitude) Ref:Hawaii.

The mean anomoly is 129.6, is the angular distance of the planet from the perihelion or aphelion. Ref:Dictionary.The Semi-Major Axis of the orbit is 44.015, which is the furthest point from the centre to the edge of an elliptical point.

The orbital inclination, the angle at which Altjira orbits in relation to the orbital plane is 5.2 degrees. The orbital eccentricity is 0.066, it is the degree at which Altjira orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

Altjira Facts


TypeKuiper Belt Object
Number148780
Alternative Name2001 UQ18
Date of Discovery2001-10-20
DiscovererDeep Ecliptic Survey
Absolute Magnitude5.7
Aphelion (Furthest)46.905 A.U.
Perihelion (Nearest)41.125 A.U.
Longitude Of Ascending Node1.8
Argument of Perihelion296.3
Mean Anomoly129.6
Semi-Major Axis44.015
Orbital Inclination (degrees)5.2
Orbital Eccentricity0.066


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