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Where does this formula for the argument of periapsis come from?

The argument of periapsis is the angle between the node vector $\vec{n}$ (which points towards the ascending node) and the eccentricity vector $\vec{e}$ which points towards periapsis. By the dot ...
ThePuzzlemaker's user avatar
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Where does this formula for the argument of periapsis come from?

The arctan2 expression eliminates the need for having two alternate expressions using the inverse cosine. They are equivalent. But do be careful when using ...
David Hammen's user avatar
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