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Longitude of the ascending node




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The longitude of the ascending node, for a heliocentric orbit.

The longitude of the ascending node (☊ or Ω) is one of the orbital elements used to specify the orbit of an object in space. It is the angle from a reference direction, called the origin of longitude, to the direction of the ascending node, measured in a reference plane.[1]

References

ru:Кеплеровы элементы орбиты#Долгота восходящего узла