longitude of perihelion

Definition of longitude of perihelion

: the heliocentric longitude of the perihelion point of a planet's or comet's orbit as usually measured along the ecliptic to the orbit's node and thence along the orbit to the perihelion point

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“Longitude of perihelion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/longitude%20of%20perihelion. Accessed 12 Aug. 2020.

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