from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The angle PFC formed by P = the periapsis of a celestial body's elliptical orbit, F = the focus of that orbit, and C = the current position of the celestial body.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the angular distance of a point in an orbit past the point of periapsis measured in degrees


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