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Topic: Longitude of the ascending node

Related Topics

Ascending node

Argument of periapsis

Argument of the perihelion

Planetary orbit

Orbital elements

Mean longitude

Orbital speed

Orbit equation

Inclination

First Point of Aries

Orbital period

Standard gravitational parameter

Astrodynamics

Vernal equinox

Double planet

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	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.
		180 degrees from the ascending node is the descending node.
		LAN realtes the orbits orientation to the Prime Meridian.
	astronautica.com /astro (1528 words)

	Orbital Elements and Astronomical Terms
		Figure 2): The angle between the plane of the orbit and the plane of the celestial equator for Earth orbiting satellites (or the plane of the ecliptic for sun orbiting satellites).
		* Longitude of the Ascending Node, (W in Figure 2): The angle between the vernal equinox and the ascending node, measured counter-clockwise.
		It is equal to the sum of the Argument of Perigee and the Longitude of the Ascending Node (W + w in figure 2).
	www.physics.ncsu.edu /courses/astron/orbits.html (1242 words)

	Orbit (astronomy and physics) - MSN Encarta
		The three orbital elements that describe an orbit's orientation are the inclination (i), the longitude of the ascending node (Ω), and the argument of the periapsis (ω).
		The longitude of the ascending node is the angle in the reference plane between the equinox and the ascending node.
		The argument of the periapsis measures the angular displacement in the plane of the orbit between the ascending node and the line that passes through the center of the orbit (C) and the periapsis (P).
	encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=761556131 (917 words)

	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.
		180 degrees from the ascending node is the descending node.
		LAN realtes the orbits orientation to the Prime Meridian.
	www.astronautica.com /astro (1528 words)

	Parameters Describing Elliptical Orbits
		The angle from the ascending node to the pericenter, measured in the plane of the orbit.
		Angle from the origin of longitude of the reference plane to the orbit's ascending node.
		Mean Longitude is the longitude that an orbiting body would have if its orbit were circular and its inclination were zero.
	www.lns.cornell.edu /~seb/celestia/orbital-parameters.html (768 words)

	Procedure (Site not responding. Last check: 2007-09-11)
		Longitude is defined in the obvious way in the direction of rotation along the equator.
		The zero longitude point is the ascending node, where the solar equator crosses the ecliptic plane from south to north.
		(the longitude of the ascending node of the sun's equator) and i
	bea.st /text/jrlab1/node4.html (472 words)

	Planetary Orbits (Site not responding. Last check: 2007-09-11)
		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 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.au.af.mil /au/awc/awcgate/jplbasic/bsf5-1.htm (1003 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.
		Celestial longitude of the ascending node are the remaining elements.
		The orbital period is of interest to operations, although it is not one of the six Keplerian elements needed to define the orbit.
	www2.jpl.nasa.gov /basics/bsf5-1.htm (1166 words)

	Orbital Mechanics
		Nodes are the points where an orbit crosses a plane, such as a satellite crossing the Earth's equatorial plane.
		The longitude of the ascending node is the node's celestial longitude.
		Celestial longitude is analogous to longitude on Earth and is measured in degrees counter-clockwise from zero with zero longitude being in the direction of the vernal equinox.
	www.braeunig.us /space/orbmech.htm (6414 words)

	Longitude of the ascending node - Wikipedia, the free encyclopedia
		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.
		"ascending node" is placed in the reference direction which is equivalent to setting
	en.wikipedia.org /wiki/Longitude_of_the_ascending_node (213 words)

	17.2.1 Nodes and node positions
		Section 5.3 introduced the "node-config" utility used to prime the node generator for different types of satellite nodes.
		The ascending node refers to the point where the footprint of the satellite orbital track crosses the equator moving from south to north.
		In this simulation model, the parameter longitude of ascending node specifies the earth-centric longitude at which the satellite's nadir point crosses the equator moving south to north.
	www.isi.edu /nsnam/ns/doc/node200.html (693 words)

	Final Gallery
		An ascending node is when the satellite crosses the plane going from south to north.
		The longitude of the ascending node is similar to longitude on Earth, and it is measured in degrees counter-clockwise from zero longitude, which is in the direction of the vernal equinox.
		The angular distance between the ascending node and the point of periapsis is known as the argument of periapsis.
	aerospacescholars.jsc.nasa.gov /has/Students/finalGall.cfm?id=1061 (920 words)

	Frequently Asked Questions (FAQ)
		Keplerian elements are eccentricity, semimajor axis, mean anomaly, inclination, longitude of the ascending node, and argument of perihelion.
		Comet elements are eccentricity, perihelion distance, time of perihelion passage, inclination, longitude of the ascending node, and argument of perihelion.
		The point S represents the sun, P represents perihelion, i is the inclination, lower case omega (ω) is the argument of perihelion, and upper case omega (Ω) is the longitude of the ascending node.
	ssd.jpl.nasa.gov /?faq (1324 words)

	CSPICE Routines: SPKW17_C
		The following terms are used in the discussion of elements of eqel: inc --- inclination of the orbit argp --- argument of periapse node --- longitude of the ascending node e --- eccentricity of the orbit eqel[0] is the semi-major axis (A) of the orbit in km.
		eqel[3] is the mean longitude (mean0+argp+node) at the epoch of the elements measured in radians.
		eqel[8] is the rate of the longitude of the ascending node (dnode/dt).
	www.gps.caltech.edu /~marsdata/cspice/spkw17_c.html (883 words)

	The Sirius Research Group
		By about the year 67730, the line of nodes of Mercury will have turned over an additional 180 degrees with respect to that of Venus, and at that time the longitudes of the two ascending nodes will differ by 180 degrees, and so on.
		The lines of nodes, eccentricities and inclinations of all planets are subject to so-called secular variations.
		For instance, relative to inertial space, while the line of nodes of Venus rotates by -0.278 degree per century (the negative sign indicating retrograde motion), that of Mercury's orbit moves by -0.125 degree per century, that of Mars by -0.295 degree, that of Jupiter by +0.177 degree, and so on.
	siriusresearchgroup.com /experts/JM2.shtml (1345 words)

	Argument of periapsis - Wikipedia, the free encyclopedia
		The argument of periapsis (ω) is the orbital element describing the angle between an orbiting body's ascending node (the point where the body crosses the plane of reference from South to North) and its periapsis (the point of closest approach to the central body), measured in the orbital plane and in the direction of motion.
		Adding the argument of periapsis to the longitude of the ascending node gives the longitude of the periapsis.
		In the case of circular orbits it is often assumed that the periapsis is placed at the ascending node and therefore
	en.wikipedia.org /wiki/Argument_of_Perihelion (262 words)

	Peak Oil News & Message Boards Forums >> Post 24560 >> Eccentric and mean anomalies at the non-apsidal endpoint. (Site not responding. Last check: 2007-09-11)
		The angle, subtended at the sun, measured in the ecliptic, from the Vernal Equinox to the ascending node.
		The ascending node is the point at which the orbit crosses the ecliptic having the Z component of its velocity in the direction of the North Ecliptic Pole.
		The longitude of the ascending node on the long path will be that of the short path plus or minus pi radians, whichever will keep it inside the interval [0, 2 pi).
	www.peakoil.com /post24560.html (4619 words)

	ascending node
		The point in an orbit where a body traveling from south to north crosses a reference plane, such as the plane of the ecliptic (in the case of a Solar System object) or the celestial equator.
		The opposite point in the orbit, where the body moves from north to south across the reference plane, is the descending node.
		The longitude of the ascending node is an orbital element.
	www.daviddarling.info /encyclopedia/A/ascending_node.html (138 words)

	[No title]
		Jupiter System I Jupiter System II Jupiter System III Measuring longitude values on Jupiter is made difficult by the fact that the planet rotates more rapidly near the equator than it does at the poles.
		For example, Project Pluto's corporate headquarters is located at latitude N 43.01 degrees, longitude W 69.70 degrees; those two numbers specify its position to within a mile or so.
		ascending node longitude of the ascending node Among the numbers making up the orbital elements of an object is the longitude of the ascending node.
	www.projectpluto.com /gloss/help_11.htm (2902 words)

	dvaa November 2006 Astronomical Data
		Mercury is at the ascending node at 6:00; a maximum lunar libration of 9.6 degrees occurs at 6:00; Neptune is at eastern quadrature at 15:00
		The Moon is at the descending node (longitude 173.7 degrees) at 13:26; Venus is 0.43 degree south of Jupiter at 21:00; the Moon is at apogee, subtending 29'29" from a distance of 405,194 km, at 23:00
		The Sun (ecliptic longitude 240.96 degrees) enters Scorpius at 10:00; Venus is at the descending node at 10:00; a maximum lunar libration of 8.3 degrees occurs at 23:00
	dvaa.org /AData/AD2006_11.html (1256 words)

	SLA_PV2EL - Orbital Elements from Position/Velocity
		The PV 6-vector is with respect to the mean equator and equinox of epoch J2000.
		(TT MJD) ORBINC = inclination i (radians) ANODE = longitude of the ascending node
		At very small inclinations, the longitude of the ascending node ANODE becomes indeterminate and under some circumstances may be set arbitrarily to zero.
	www.hartrao.ac.za /nccsdoc/slalib/sun67.htx/node156.html (408 words)

	ComputaMaps - Technology glossary (Site not responding. Last check: 2007-09-11)
		For example, an attribute code for an area might identify it to be a lake or swamp; an attribute code for a line might identify a road, railroad, stream or shoreline.
		The horizontal datum, used as a reference for position, is defined by the latitude and longitude of an initial point, the direction of a line between this point and a specified second point, and two dimensions which define the spheroid.
		These relationships are expressed as connections between spatially touching lines, small areas contained within larger areas, lines that make up the sides of an area or polygon, etc. Topology does not provide information as to the features' meanings, only their identity and structural relationships as they define spatial objects.
	www.computamaps.com /tech_glossary.php (3349 words)

	SLA_UE2EL - Universal to Conventional Elements (Site not responding. Last check: 2007-09-11)
		The ``universal'' elements are those which define the orbit for the purposes of the method of universal variables (see reference 2).
		(TT MJD) ORBINC = inclination i (radians) ANODE = longitude of the ascending node
		At very small inclinations, the longitude of the ascending node ANODE becomes indeterminate and under some circumstances may be set arbitrarily to zero.
	star-www.rl.ac.uk /star/docs/sun67.htx/node190.html (535 words)

	GPS Constellation Nominal Orbit Parameters
		is the geodetic longitude where the satellite is at the reference epoch.
		Since the longitude of each satellite is given independently of latitude, it is given for both sides of the earth (i.e.
		is the geodetic longitude at which each orbit plane intersects the equator at the epoch.
	home.earthlink.net /~fjolles/gps_constell.htm (128 words)

	Mir De-orbit (Site not responding. Last check: 2007-09-11)
		The original parameter published by Russia as determining the ground track on re-entry day was the first orbit ascending node to the West of 20 degrees East longitude (nominally an ascending node at 2.5 degrees west).
		Once the date was set for March 23, Mission Control settled on re-entry from an orbit with an ascending node at 5 degrees West longitude.
		For comparison the originally described "Koptev Corridor" resulted from an ascending node at 19 degrees West.
	www.zarya.info /Tracking/Orbits/Mir-Re-entry.htm (1004 words)

	Asteroid (32890) Schwob - 1994 AL1
		The angle (in the body's orbit plane) between the ascending node line and perihelion measured in the direction of the body's orbit.
		The sum of the longitude of the ascending node and the argument of perihelion.
		The sum of the mean anomaly and the longitude of perihelion.
	www.classicalarchives.com /32890schwob.html (703 words)

	Equation of Time : Ellipse (Site not responding. Last check: 2007-09-11)
		Longitude of the Ascending Node: This is the angle between the line of nodes and the zero point of longitude in the reference plane, labeled in the diagram as W. Inclination to the Ecliptic: This is the angle between the orbital plane and the equatorial or reference plane.
		Our solar system is shaped like a disc, so the planets for the most part orbit on the same reference plane, known as the ecliptic, but they do have slight deviations.
		Argument of Perihelion: Labeled w in the diagram, this is the angle between the ascending node and the planet's location at perihelion.
	archive.ncsa.uiuc.edu /Classes/MATH198/matownse/math_orbit.html (343 words)

	CelesTrak: "More on the Geostationary Orbit"
		As it turns out, one of the common ways of expressing a geostationary satellite's position is to specify its longitude—that is, the longitude on the equator over which the satellite appears to hover.
		This guide is generated using the latest two-line element sets and determines each satellite's longitude at its ascending node.
		Knowing the longitude of the satellite and the latitude and longitude of the observer, we can now determine where to look.
	celestrak.com /columns/v04n09 (1680 words)

	Orbital categories
		Omega, the longitude of the ascending node at which the orbit crosses the equator northbound.
		Omega, the argument of perigee, the angle between the ascending node and the perigee.
		The Earth is not a point mass; field harmonics and atmospheric drag affect the orbit.
	www.planet4589.org /space/log/orbits.html (534 words)

	NOAA POLAR ORBITER DATA USER'S GUIDE Section 1.2
		This information consists of the orbit number, longitude of ascending and descending nodes, height of satellite at each node, and date and local time.
		Or, conversely, if the orbit number and ascending node longitude are known, then the spinner can be rotated to the proper longitude and the orbital coverage will be shown as that area covered by the spinner.
		The PSCEAR reports contain osculating Keplerian elements at epoch, the inertial Cartesian elements, the Brouwer mean elements at epoch, the anomalistic and nodal periods, orbit number at epoch, plus the first time derivatives of: the right ascension of the ascending node, argument of perigee and the mean anomaly.
	www2.ncdc.noaa.gov /docs/podug/html/c1/sec1-2.htm (1119 words)

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