Heliocentric longitude

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Related to Heliocentric longitude: celestial longitude
the longitude of a heavenly body, as seen from the sun's center.

See also: Longitude

References in periodicals archive ?
Pulkkinen (Astrophysical Journal Supplement Series, November 1979), the largest perturbation term due to Uranus can displace Saturn up to 28 arcseconds in heliocentric longitude, and the combined effect of several such terms can exceed 1 arcminute.
Let's reduce the problem to two dimensions and ask whether all the planets can have the same heliocentric longitude (they can never line up in three dimensions because their orbital planes are all slightly different).
Our program makes small steps through time, calculating the nine planets' heliocentric longitudes and distances from the Sun.