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(5) Astraea Asteroid

Astraea is an asteroid, a large rock that orbits the Sun mainly between the orbits of Mars and Jupiter. They tend to be an irregular shaped but Ceres asteroid is known to be spherical in shape but because it doesn't clear its path round the Sun, it is only a dwarf planet.

Astraea was discovered on Dec 8 1945 by Karl Ludwig Hencke.

The absolute magnitude of the object is 6.85 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 albedo of the object is 1. The Albedo is the amount of radiation that is reflected back into space by the object.

The Aphelion of the object is 3.06 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 2.081 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 141.57661 degrees. The Argument of Perihelion is 358.6876. 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 282.36630, is the angular distance of the planet from the perihelion or aphelion. Ref:Dictionary.The Semi-Major Axis of the orbit is 2.5742489, which is the furthest point from the centre to the edge of an elliptical point.

The orbital inclination, the angle at which Astraea orbits in relation to the orbital plane is 5.36699 degrees. The orbital eccentricity is 0.1910946, it is the degree at which Astraea orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

Path of Astraea Orbit

If the white lines are above, then the path of the object is under the ecliptic. If the white lines are below, the path is above the ecliptic. This refers to the Inclination of the object. The image was created using N.A.S.A. Solar System Dynamics.

Path of Astraea Orbit

Astraea Facts

Date of DiscoveryDec 8 1945
DiscovererKarl Ludwig Hencke
Absolute Magnitude6.85
Aphelion (Furthest)3.06 A.U.
Perihelion (Nearest)2.081 A.U.
Longitude Of Ascending Node141.57661
Argument of Perihelion358.6876
Mean Anomoly282.36630
Semi-Major Axis 2.5742489
Orbital Inclination5.36699
Orbital Eccentricity0.1910946

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