descending node


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Related to descending node: Line of nodes

descending node

See nodes.

descending node

[di′sen·diŋ ′nōd]
(aerospace engineering)
That point at which an earth satellite crosses to the south side of the equatorial plane of its primary. Also known as southbound node.
(astronomy)
The point at which a planet, planetoid, or comet crosses the ecliptic from north to south.
References in periodicals archive ?
This has been the case for several millennia and it will continue long into the future, but after many more millennia, eventually, for transits taking place at Venus' descending node the southward displacement of the chord is replaced by a northward one.
The paths are parallel, but at the second transit the chord is displaced by about 24' to the south at the ascending node or by about 20' to the north at the descending node.
A list of transits from -2999 to 3000 was given by Meeus, (10) who introduced the alphabetical system for identifying each series, which uses upper case characters for transits occurring at the ascending node and the lower case for those at the descending node.
25 AU outside the descending node and the orbital evolution will slowly decrease this distance, raising the possibility of a meteor shower from this comet in a few hundred years time.

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