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Topic: Descending node


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In the News (Mon 22 Apr 19)

  
  Practical Astronautics
ascending node - the point on the orbit where the spacecraft crosses the equatorial plane moving from the southern hemisphere to the northern hemisphere.
descending node - the point in the orbit where the spacecraft crosses the equatorial plane moving from the northern hemisphere to the southern hemisphere.
180 degrees from the descending node is the ascending node.
astronautica.com /astro   (1528 words)

  
 Reference.com/Encyclopedia/Lunar node
The lunar nodes are the orbital nodes of the Moon, that is, the points where the orbit of the Moon crosses the ecliptic (which is the apparent path of the Sun across the heavens against the background stars).
The lunar nodes precess rather quickly around the ecliptic, completing a revolution (called a draconitic or nodical period, the period of nutation) in 6793.5 days or 18.5996 years (please beware that this is not the saros eclipse cycle).
Since the ascending node is the point of intersection between the ecliptic and the plane of the lunar orbit where the Moon is ascending from the South to the North, it is sometimes called the North node.
www.reference.com /browse/wiki/Lunar_node   (744 words)

  
 NASA - Eclipses and the Saros
Because the saros period is not equal to a whole number of days, its biggest drawback is that subsequent eclipses are visible from different parts of the globe.
In particular, the Moon's node shifts eastward by about 0.5º with each cycle.
If the first eclipse occurs at the Moon's descending node, the Moon's umbral shadow will pass ~3500 km below Earth and a partial eclipse will be visible from the south polar region.
sunearth.gsfc.nasa.gov /eclipse/LEsaros/LEsaros.html   (1156 words)

  
 Definition of Descending node
The descending node is the point in the orbit of an object where it crosses the plane of the ecliptic from the north celestial hemisphere to the south celestial hemisphere in the direction of motion.
Because of this, the descending node of the orbit of the Earth's moon is one of only two places where a lunar or solar eclipse can occur.
The line of nodes is the intersection of the object's orbital plane with the ecliptic, and runs between the ascending and descending nodes.
www.wordiq.com /definition/Descending_node   (157 words)

  
 Cause and Frequency of Solar Eclipse
This is due to the tilting of the lunar orbit at a small angle of about 5 degrees to the orbital plane of the Earth, which is also known as the ecliptic.
The lunar orbit is tilted at 5 degrees to the orbital plane of the Earth.
To have a solar eclipse, the New Moon must be near or at a node.
www.bibalex.org /eclipse2006/CauseAndFrequency.htm   (1057 words)

  
 Astroprof’s Page » Ascending Node
If a planet is at its ascending node, than that means that it is crossing the ecliptic moving from south to north.
When the planet is at its descending node, then it is crossing the ecliptic moving from north to south.
It’s worth adding that for Earth orbiting satellites the terms ascending and descending node are used for the points where the satellite cross the equator, northbound and southbound respectively.
astroprofspage.com /archives/929   (1063 words)

  
 Catalog of Transits of Venus
For example, Series 4 (December at Ascending Node) began in -1763 (1764 BCE) and will run through 2854 (a grazing transit) for a total of 20 transits spanning 4617 years.
The descending node is the point along a planet's orbit where it crosses the ecliptic (Earth's orbital plane) from north to south.
The ascending node is the point along a planet's orbit where it crosses the ecliptic (Earth's orbital plane) from south to north.
sunearth.gsfc.nasa.gov /eclipse/transit/catalog/VenusCatalog.html   (1731 words)

  
 GNU tar 1.19: 6.9 Descending into Directories
grabs directory entries themselves, but does not descend on them recursively.
usually recursively descends on directories, they have to use the ‘
This document was generated by Sergey Poznyakoff on October, 10 2007 using texi2html 1.78.
www.gnu.org /software/tar/manual/html_node/tar_109.html   (275 words)

  
 USGS (U.S. Geological Survey) EROS, Sioux Falls, SD
A high order resampling technique in which the brightness value of a pixel in a corrected image is interpolated from the brightness values of the 16 nearest pixels around the location of the corrected pixel.
An arc having the same polygon on both its left and right sides and having at least one node that does not connect to any other arc.
A descending node would imply a southbound Equatorial crossing.
edc.usgs.gov /guides/glossary/c_d.html   (1654 words)

  
 USGS (U.S. Geological Survey) EROS, Sioux Falls, SD   (Site not responding. Last check: 2007-10-29)
A high order resampling technique in which the brightness value of a pixel in a corrected image is interpolated from the brightness values of the 16 nearest pixels around the location of the corrected pixel.
Often identifies that a polygon does not close properly (e.g., undershoot), that arcs do not connect properly, or that an arc was digitized past its intersection with another arc (e.g., overshoot).
The topological linkages are explicitly encoded for node, area, and line elements.
edcwww.cr.usgs.gov /guides/glossary/c_d.html   (1654 words)

  
  node. The Columbia Encyclopedia, Sixth Edition. 2001-05
The lunar nodes are the points where the moon’s line of nodes, when extended, strike the celestial sphere.
The lunar nodes regress (move westward along the ecliptic) due to perturbations from the other bodies in the solar system, e.g., the sun and planets.
The ascending node, when the sun appears to cross the celestial equator from south to north, is the vernal equinox; the descending node is the autumnal equinox.
www.bartleby.com /65/no/node.html   (225 words)

  
 node@Everything2.com   (Site not responding. Last check: 2007-10-29)
Nodes (or, sometimes, "nodules") are calluses that form on the vocal cords in response to misuse.
The ascending node is the vector intersected by the orbit as the satellite moves from south to north.
The descending node is the opposite: the vector intersected by the orbit as the satellite moves from north to south.
www.everything2.net /index.pl?node=node   (2848 words)

  
 node - HighBeam Encyclopedia
The ascending node, when the sun appears to cross the celestial equator from south to north, is the vernal equinox ; the descending node is the autumnal equinox.
Lymph node biopsy specimens and diagnosis of cat-scratch disease.
Analysis of lobar lymph node metastases around the bronchi of primary and nonprimary lobes in lung cancer *: risk of remnant tumor at the root of the nonprimary lobes.
www.encyclopedia.com /doc/1E1-node.html   (766 words)

  
 Astrology: Lunar Nodes.
Lunar nodes are points that mark the intersection of the Moon's orbit around the Earth with the ecliptic.
The North Node is only one that appears on many computer generated horoscope charts and the position of the south node is derived from this.
In general, however, the north nodes is viewed a point of opportunity for growth and development, while the south is thought to represent karmic repression or tendencies that restrict growth.
www.astrology-numerology.com /nodes.html   (467 words)

  
 * Descending node - (Astronomy): Definition
The points at which the orbit of the Moon, a planet or a comet intersect with the plane of the ecliptic; south to north (Ascending Node), north to south (Descending Node).
The points where the Moon's orbit crosses the ecliptic are called the lunar nodes: the ascending node is where the Moon crosses to the north of the ecliptic; the descending node where it crosses to the south.
nodes in the moon's orbit around the earth; the point where the moon in its orbit crosses from south of the ecliptic plane to north of it is called the ascending node, and the point where it crosses from north to south is called the descending node.
en.mimi.hu /astronomy/descending_node.html   (299 words)

  
 Starry Night Pro Help
The descending node of the orbit -- the point at which the planet crosses down through the ecliptic plane -- is marked with a hollow wedge.
The ascending node of the orbit (the point at which the planet moves northward through the ecliptic plane), is marked with a solid wedge.
The descending node of the orbit (the point at which the planet moves southward through the ecliptic plane), is marked with a hollow wedge.
www.starrynight.com /helpPro/OrbitOptions.shtml   (405 words)

  
 [No title]   (Site not responding. Last check: 2007-10-29)
Local time of coverage was also different: for ascending node orbits the Northern Hemisphere was observed in the morning and the Southern Hemisphere in the afternoon, while for descending node orbits the Northern Hemisphere was observed in the afternoon and the Southern in the morning.
These differences appeared to compensate across the scan, however, an increase in sun glint in descending node over that in ascending node on the western part of the scan was compensated by a decrease on the eastern part of the scan.
For descending node, morning orbits produced the lowest mean solar zenith angles for the Northern Hemisphere; afternoon orbits produced the lowest angles for the Southern Hemisphere.
oceancolor.gsfc.nasa.gov /SeaWiFS/TECH_REPORTS/vol2_abs.html   (369 words)

  
 Eclipse Glossary
descending node -- the point in the orbit of the Moon where it passes from above the ecliptic plane to below (see node).
The Moon's orbit intersects the ecliptic plane at the ascending node and the descending node.
For example, the Moon travels from west to east, but its nodes are regressing from east to west.
www.earthview.com /resources/glossary.htm   (1252 words)

  
 Basics of Space Flight Section I. The Environment of Space
As an orbiting body crosses the ecliptic plane going north, the node is referred to as the ascending node; going south, it is the descending node.
Argument of periapsis is the argument (angular distance) of the periapsis from the ascending node.
Celestial longitude of the ascending node are the remaining elements.
www2.jpl.nasa.gov /basics/bsf5-1.html   (1166 words)

  
 Orbits
As an orbiting body crosses the ecliptic plane going north, the node is referred to as the ascending node; going south, it is the descending node.
The (4) argument of periapsis is the angular distance of periapsis from the ascending node.
Likewise, the descending node is where the orbit crosses the equator in a southbound direction.
zebu.uoregon.edu /~js/space/lectures/lec06.html   (3325 words)

  
 Rahu & Ketu
The place where the path of the Moon crosses the ecliptic moving northward is called the ascending node and the place where the path of the Moon crosses the ecliptic moving south is called the descending node.
Thus the Moon crosses the ecliptic at the ascending node, roughly 14 days later crosses the ecliptic again at the descending node, and roughly 14 days later it is back to the ascending node crossing.
Since the nodes are imaginary points they are referred to as "shadow planets" and are named to honor the mythical characters; the ascending node is called Rahu and the descending node is called Ketu.
users.hartwick.edu /hartleyc/rahu.htm   (840 words)

  
 Aquamoonlight Astrology - Nodes - North Node, South Node - Karma
The Nodes are the points at which the Moon's path around the Sun intersects the ecliptic (the path of the Sun).
When the Moon crosses the ecliptic from north to south this is the descending node otherwise known as the South Node.
The South Node is said to represent the abilities and habits brought forward from the previous lifetime.
www.aquamoonlight.co.uk /nodes.html   (313 words)

  
 SPOT 4's orbit   (Site not responding. Last check: 2007-10-29)
For SPOT satellites, this is a 22.5° angle, which means that the local time of the descending node is 10:30.
This means that the actual orbit's descending nodes are further east than those of the reference orbit.
At this point in time, the descending nodes must be no more than 3 km to the west.
ceos.cnes.fr:8100 /cdrom-00b2/ceos1/satellit/spotsys/spot4/ang/orbite.htm   (1865 words)

  
 Wikinfo | Node   (Site not responding. Last check: 2007-10-29)
A node is a basic unit used to build data structures, such as linked lists and tree data structures.
For instance, in a guitar string, the ends of the string are nodes.
By changing the position of one of these nodes through fretwork, the guitarist changes the effective vibrating length of the string and thereby the note played.
www.wikinfo.org /wiki.php?title=node   (260 words)

  
 [No title]
The document element node for a document is a child of the root node.
A root node is the topmost node in the tree that represents the contents of an XML document.
Descendants of preceding siblings of the context node
www.stylusstudio.com /docs/v62/d_xpath5.html   (1980 words)

  
 Node: Free Encyclopedia Articles at Questia.com Online Library   (Site not responding. Last check: 2007-10-29)
Altering the standard...new approach is the use of sentinel lymph node biopsy (SLNB) performed as an outpatient...current practice using SLNB, the sentinel node is quick-frozen; a pathologist then examines...
NODE in astronomy, point at which the orbit of a body crosses a reference plane...crosses from south of the ecliptic plane to north of it is called the ascending node, and the point where it crosses from north to south is called the descending node.
...non-Hodgkins lymphoma is often a painless swelling of a lymph node in the neck, the groin, or under the arm.
www.questia.com /library/encyclopedia/101261490   (1619 words)

  
 Celestial Alignments
Since the plane of the moon's orbit is tilted at an angle to the earth's orbit, the planes intersect at a line, called the line of nodes.
The descending node uses the same symbol, but upside down, called the dragon's tail.
The line of nodes of the moon's orbit slowly rotates westward at a rate of 0.053 degrees per day, making one rotation in 18.6 years.
ourworld.compuserve.com /homepages/bmoler/alignmnt.htm   (1069 words)

  
 The Landsat Program - Images
Schematic diagram illustrating the geometry of a sun-synchronous orbit for the morning descending node of Landsat.
The parameter that determines the actual illumination time histories is the orbit o'clock angle.
This is the angle between the ascending or descending node and the "mean sun" vector.
landsat.gsfc.nasa.gov /images/sun-sync.html   (179 words)

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