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Topic: Orbital node

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In the News (Fri 26 Apr 19)

Either of the points on the celestial sphere at which the plane of an orbit intersects a reference plane.
The position of a node is one of the standard orbital elements used to specify the orientation of an orbit.
An antinode lies 90° of orbital longitude away from its corresponding node.
www.daviddarling.info /encyclopedia/N/node.html   (110 words)

 S Orbitals
The 2s orbital is distinctly different from the 1s orbital.
The node of the 2s orbital is responsible for the presence of two spheres.
In a 2s orbital the electron density increases to a maximum near the nucleus and then drops off to zero at the node.
www.cem.msu.edu /~johnston/graphics/nitrogen/sorbitals.html   (75 words)

  Orbital Mechanics
Inclination is the angular distance between a satellite's orbital plane and the equator of its primary (or the ecliptic plane in the case of heliocentric, or sun centered, orbits).
The longitude of the ascending node is the node's celestial longitude.
Orbital transfer becomes more complicated when the object is to rendezvous with or intercept another object in space: both the interceptor and the target must arrive at the rendezvous point at the same time.
www.braeunig.us /space/orbmech.htm   (6414 words)

 Orbital node
The ascending (or north) node is where the object moves north from the southern hemisphere to the northern, the descending (or south) node is where the object moves back south.
The symbol of the ascending node is ☊, descending node is ☋.
The lunar nodes are subject to lunar precession, which is the gradual shift westward because of the gravitational pull of the Sun upon the Moon.
www.1bx.com /en/Ascending_node.htm   (208 words)

 NationMaster - Encyclopedia: Lunar eclipse
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).
However, since the orbital plane of the Moon is inclined by about 5° with respect to the orbital plane of the Earth (the ecliptic), most full moons occur when the Moon is either north or south of Earth's shadow.
For an eclipse to occur, the Moon must be near its orbital node —the intersection of the orbital planes.
www.nationmaster.com /encyclopedia/Lunar-eclipse   (3114 words)

 Longitude of the ascending node - Biocrawler   (Site not responding. Last check: 2007-10-25)
The Longitude of the ascending node (☊, also noted Ω) is one of the orbital elements used to specify the orbit of an object in space.
For a Sun-orbiting body, it is the angle formed at the Sun from the First Point of Aries to the body's ascending node, measured in the reference plane (the ecliptic) and in the direct sense.
In astrodynamics, for elliptic orbits the longitude of the ascending node
www.biocrawler.com /encyclopedia/Longitude_of_the_ascending_node   (186 words)

 The Dispatch - Serving the Lexington, NC - News
An orbital node is one of the two points where an inclined orbit crosses a plane of reference (e.g.
Nodes do not exist for orbits with inclination equal to zero (equatorial orbits or ecliptic orbits).
Lunar node – the orbital nodes of the Moon.
www.the-dispatch.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=descending_node   (178 words)

 NationMaster - Encyclopedia: Periapsis
The orbital inclination was 105.6°, and the latitude of periapsis was near 17° N. The Pioneer Venus instruments are described in IEEE Trans.
The argument of periapsis (4) is the argument (angular distance) of periapsis from the ascending node.
Time of periapsis passage (5) and the celestial longitude of the ascending node (6) are the remaining elements.
www.nationmaster.com /encyclopedia/Periapsis   (575 words)

 Lunar node Information
Usually only the north node is marked in horoscopes, as the south node is by definition always located at the opposite point in the astrological chart.
In general, the north node is viewed a point of opportunity for growth and development and self help, while the south node is thought to represent karmic repression or tendencies that restrict growth.
The north node carries the positive and ultra-beneficial tone of Jupiter, while the south node expresses the restrictions and obstacles of Saturn.
www.bookrags.com /Lunar_node   (461 words)

 The Orbitron: a gallery of atomic orbitals and molecular orbitals   (Site not responding. Last check: 2007-10-25)
This behaviour is unlike that of the s orbitals for which the value of the wave function for a given value of r is the same no matter what direction is chosen.
In general, apart from a nodal plane, p-orbitals have a number of radial nodes that separate the largest, outer, component from the inner components.
The number of radial nodes is related to the principal quantum number, n.
www.shef.ac.uk /chemistry/orbitron/AOs/7p/wave-fn.html   (339 words)

 The Sirius Research Group
The orbit of Venus is tilted by approximately 3.4° relative to the ecliptic (Earth's orbital plane).
The orbital planes of the other planets in our solar system do not show a similar motion in the same direction or to a similar extent.
However, the orbital node movement of Venus, and hence the occurrence of transit pairs, does indeed suggest a resonance effect.
www.siriusresearchgroup.com /articles/OpenLetter.shtml   (410 words)

 Basics of Space Flight Section I. The Environment of Space
Argument of periapsis is the argument (angular distance) of the periapsis from the ascending node.
The orbital period is of interest to operations, although it is not one of the six Keplerian elements needed to define the orbit.
A walking orbit whose parameters are chosen such that the orbital plane precesses with nearly the same period as the planet's solar orbit period is called a sun synchronous orbit.
www2.jpl.nasa.gov /basics/bsf5-1.html   (1166 words)

 Definition of Ascending node
The ascending node is one of the orbital nodes, a point in the orbit of an object where it crosses the plane of the ecliptic from the south celestial hemisphere to the north celestial hemisphere in the direction of motion.
Because of this, the ascending 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/Ascending_node   (162 words)

 Hypothetical Planets
Lescarbault estimated the orbital inclination to between 5.3 and 7.3 degrees, its longitude of node about 183 deg, its eccentricity "enormous", and its transit time across the solar disk 4 hours 30 minutes.
Lagrange in 1761 (Lagrange announced that the orbital plane of the satellite was perpendicular to the ecliptic).
The inclination was 1.40 degrees and the longitude of the ascending node 103 degrees.
seds.lpl.arizona.edu /billa/tnp/hypo.html   (9089 words)

 Catalog of Transits of Mercury
The shorter periods are a consequence of several longer harmonics between the orbital periods of Mercury and Earth.
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/MercuryCatalog.html   (1700 words)

 Bonds   (Site not responding. Last check: 2007-10-25)
In the second sigma bonding case, the p orbital can reach out to the s orbital, but the overlap is smaller because the s orbital cannot reach out to the p orbital.
For example, in the fully antibonding orbital, N = 5, therefore the number of nodes should be 4, which there is. There is also one more type of molecular orbital, the non-bonding type, and plays no role in bonding.
The larger B is, the better the overlap and the greater the separation between the bonding and anti-bonding orbitals.
www.chembio.uoguelph.ca /educmat/chm729/band/bond.htm   (674 words)

 Satellite Observing: Orbital Elements
Orbital elements specify the position of the satellite at a certain time called the epoch.
Now that the orbital plane is oriented in space, then the position of the orbital ellipse in the orbital plane must be defined.
It ranges from 0 to 360 degrees, and is 0 degrees when the perigee is at the ascending node and 180 degrees when the satellite is farthest from the Earth when it rises up over the equator.
www.znark.com /sat/elements.html   (936 words)

 The Sirius Research Group
In the case of Venus, the observer on Earth needs to know the EXACT orbital times and orbital distances (or apparent changes in orbital speed) of both planets, in order to make an accurate calculation or prediction based on the calendar, as to when and where the next transits of Venus will be visible.
Evidently, Earth's orbital path around the Sun is longer from the position of Venus' descending node in June to its ascending node in December than from the December node to the June node.
A greater orbital distance for the Earth (from descending node to ascending node) requires more rotations or days, whereas an increase in Earth's orbital speed over the same distance implies less time and therefore, fewer days.
www.siriusresearchgroup.com /articles/VT4.shtml   (1410 words)

 Orbital Operations Manual - Aligning, Syncing, and Docking with a Space Station
The orbital plane always passes thru the center of the earth, but may be tilted to any angle relative to the equator.
Longitude of Ascending Node is a measurement of the point at which the orbit crosses the equator when heading from South to North (ascending).
The Ascending Node is the intersection in which we cross the target orbit heading south to north.
smithplanet.com /stuff/orbiter/orbitaloperations.htm   (10596 words)

 Chemistry 101A, Atomic and Molecular Oribtals Page
The orbitals are not all shown on the same scale (except for the 1s and 2s orbitals, which are on the same scale).
In this orbital most of the electron "density" is in the two outer lobes of the orbital, but there is some electron density in the two small inner lobes.
The 2p-sigma orbital is a bonding orbital which can be approximated by two 2p orbitals with their electron density lobes pointing toward each other.
www.chem.arizona.edu /~salzmanr/orbitals.html   (1640 words)

 Cosmos: The SAO Encyclopedia: Orbital Inclination
Along with the argument of perihelion and the ascending node, the orbital inclination (i) is one of the elements that must be specified in order to define the orientation of an elliptical orbit.
Although the ecliptic provides a convenient reference plane from which to measure the orbital inclinations of planets in our Solar System, a different reference plane should be adopted for each of the planetary systems discovered around other stars.
Note: Orbital inclination should not be confused with obliquity - the tilt of a planet's axis relative to the orbit.
cosmos.swin.edu.au /entries/orbitalinclination/orbitalinclination.html?e=1   (252 words)

 Chapter 5 -- Orbital Mechanics   (Site not responding. Last check: 2007-10-25)
Orbital mechanics is the study of the motion of human made objects as they travel around a principal body, in the majority of flights the Earth.
The inclination is the angle between the orbital plane and the equatorial plane.
This angle is measured from the ascending node in the orbital plane to the perigee point.
www.space.edu /projects/book/chapter5.html   (5633 words)

 Tutorial Using Orbital
Describe the orbital as sigma or as pi, and as bonding or as antibonding
Still with 1s orbitals selected for Atom 1 and Atom 2, change the coefficient of Atom 1 to 1.2 and the coefficient of Atom 2 to 0.8 (both positive now).
This orbital holds one of the lone pairs on oxygen in CO, i.e.
www.staff.ncl.ac.uk /bruce.tattershall/teaching/chy135/orbtut.html   (2295 words)

 Parameters Describing Elliptical Orbits   (Site not responding. Last check: 2007-10-25)
The angle from the ascending node to the pericenter, measured in the plane of the orbit.
Ω is the Longitude of the Ascending Node and
In other words, given the orbital period of one satellite, it's easy to calculate the periods of others.
www.lns.cornell.edu /~seb/celestia/orbital-parameters.html   (768 words)

 Starry Night Support Center - KnowledgeBase   (Site not responding. Last check: 2007-10-25)
Since the orbital elements of asteroids are constantly changing it is a good idea to update this Asteroids.txt file from time to time.
Astorb.dat is an ASCII file of high-precision osculating orbital elements and some additional data for all the numbered asteroids and the vast majority of unnumbered asteroids (multi-apparition and single-apparition) for which it is possible to make reasonably determinate computations.
Starry Night provides an interactive simulator where the orbital elements of an object can be changed in a visual manner making a complex subject understandable and, dare we say it, fun.
www.starrynight.com /support/support_trio/index.php?action=kb&article=169&o=save   (624 words)

 International Space Station
The nodes are built by Alenia Spazio and based on the same basic pressurised module as the COF and Multi-Purpose Logistics Modules.
The greater ISS orbital inclination meant that the Shuttle's net payload was substantially reduced.
The Unity node with the two mating adapters attached, the configuration it will be in for launch, is about 36 feet long and weighs about 25,600 pounds.
www.astronautix.com /craft/intation.htm   (8908 words)

 Childhood Rhabdomyosarcoma Treatment - National Cancer Institute
Important exceptions to the rule of normal margin exist (e.g., tumors of the orbit and of the genitourinary region).[1-3] The principle of wide and complete resection of the primary tumor is less applicable to patients known to have metastatic disease at the initial operation, but is a reasonable concept if easily accomplished.
Node dissection is not routine in Europe for adolescents with resected paratesticular rhabdomyosarcoma.
Involved nodes at diagnosis predict a higher risk of local and distant failure compared with patients whose lymph nodes are negative.[78] As with the surgical management of patients with rhabdomyosarcoma, recommendations for radiation therapy are dependent on the site of primary disease and on the extent of disease following surgical resection.
www.cancer.gov /cancertopics/pdq/treatment/childrhabdomyosarcoma/HealthProfessional/page5/print   (5266 words)

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