Comet Giacobini-Zinner returns to perihelion on 2012 February 11 and reaches the descending node
For an eclipse to occur, the line between these two nodes -- which itself rotates with a period of 347 days (the so-called eclipse year) -- must intersect the sun at a time when the moon, in its own orbit, is sufficiently close to either the ascending or descending nodes
In the present case Venus reaches inferior conjunction on June 6d 1h, passing through the descending node
at 17h, just sixteen hours later.
His head is astronomically equated with the Moon's ascending node, while the rest of his body, halfway around the sky, is the descending node
The orbit comes close to that of the Earth and it could produce a meteor shower at the descending node
The very brightest oppositions of Vesta are those that take place at its descending node
, around July 5th, when it reaches magnitude 5.
The closest approach of the orbit of the asteroid to the orbit of the earth occurs near the descending node
, at a distance of about 4,600,000 miles.
Earth closely follows Giacobini-Zinner to the comet's descending node
(where Earth passes through the comet's orbital plane).
Currently the ascending node is between the orbits of Mercury and Venus, and the descending node
between the orbits of Earth and Mars.
While the Moon closets itself in the Earth's shadow at the ascending node of its orbit this month, the Sun is occupying the descending node
on the opposite side of the sky in Pisces, the Fishes.
If the node in SRM (goal) is OR node, then the DS for that node will be calculated based on sum of the descending nodes