anomaly

• deviation from the normal or common order or form or rule
• a person who is unusual
• (astronomy) position of a planet as defined by its angular distance from its perihelion (as observed from the sun)
• Deviation from the common rule
• The angular distance of a planet from its perihelion, as seen from the sun. This is the true anomaly. The eccentric anomaly is a corresponding angle at the center of the elliptic orbit of the planet. The mean anomaly is what the anomaly would be if the planet´s angular motion were uniform
• The angle measuring apparent irregularities in the motion of a planet
• Any deviation from the essential characteristics of a specific type

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