
	Where results make sense

Topic: Keplerian

In the News (Thu 24 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Keplerian orbit Definition / Keplerian orbit Research (Site not responding. Last check: 2007-11-05)
		Keplerian orbit is a closed ellipse, where the pericenter and apocenter distances are determined by the energy and angular momentum of the orbit.
		Keplerian orbit is a closed ellipse that occurs when an object orbits a point mass, such as a planet orbiting the Sun or a binary star system.
		Keplerian orbit is an orbit that is a circle.
	www.elresearch.com /Keplerian_orbit (98 words)

	Orbital elements - Wikipedia, the free encyclopedia
		The traditionally used set of orbital elements is called the set of Keplerian elements, after Johannes Kepler and his Kepler's laws.
		Keplerian elements can be obtained from orbital state vectors using VEC2TLE software or by some direct computations.
		Keplerian elements parameters can be encoded as text in a number of formats.
	en.wikipedia.org /wiki/Orbital_elements (412 words)

	Keplerian zoom finder optical system - Patent 5144480
		A keplerian zoom finder optical system according to claim 7, wherein said field lens unit is comprised of a plano-convex single lens having its planar surface positioned near the focus position of said objective lens unit and having its convex surface facing the eye point side.
		A Keplerian zoom finder optical system according to claim 7, wherein said field lens unit is comprised of a biconvex single lens and is disposed more adjacent to the object side than to the focus position of said objective lens unit.
		Now, in the Keplerian finder, to direct the exit pupil of the objective lens O to an appropriate eye point, the presence of the field lens unit F is important.
	www.freepatentsonline.com /5144480.html (4547 words)

	Encyclopedia: Orbital elements (Site not responding. Last check: 2007-11-05)
		In astrodynamics or celestial dynamics orbital state vectors (sometimes State Vectors) are vectors of position () and velocity () that together with their time () (epoch) uniquely determine the state of an orbiting body.
		The Keplerian elements are: Download high resolution version (1024x768, 45 KB)Orbit and orbital parameters Hmmm.
		In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified.
	www.nationmaster.com /encyclopedia/Orbital-elements (969 words)

	Keplerian zoom finder optical system - Patent 5005955
		Therefore, the conventional Keplerian zoom finder is not used often since it cannot keep abreast of the trend for a winder angle in the imaging lens and a higher variable power.
		Therefore, although a conventional imaging zoom lens may be utilized as the zoom objective lens for the Keplerian zoom finder, the complicated structure of the imaging zoom lens renders it unipreferable use as the zoom objective lens for a finder which must be simplified in structure and be reduced in size.
		Therefore, in a Keplerian zoom finder optical system of the type according to the present invention, the intermediate image I formed by the zoom objective lens O must be satisfactorily aberration-corrected from the wide angle end to the telephoto end so as to be a clear intermediate image.
	www.freepatentsonline.com /5005955.html (4543 words)

	SAREX Field Operations Guide
		The Keplerian elements are a set of numbers which describe the Shuttle's orbit.
		Specifically, the Keplerian elements describe an ellipse in the celestial reference frame centered on the on the earth.
		A Keplerian element set issued during the STS-60 Shuttle mission is shown in Figure 6.
	www.datasync.com /~w8je/uguide/uguide7c.html (2099 words)

	SOS Background Info - Orbits and Energy
		The most familiar type of orbit is the Keplerian orbit, which occurs when objects orbit a point mass (i.e., planets orbiting the Sun, or the motion of a binary star system).
		However, the orbits of stars in a galaxy are not Keplerian, because the mass distribution is not concentrated in a point mass.
		Rather than form a Keplerian ellipse, stellar orbits are not closed, but slowly fill all allowable space as they move through the galaxy.
	burro.astr.cwru.edu /JavaLab/SOSweb/backOE.html (546 words)

	Keplerian (Site not responding. Last check: 2007-11-05)
		CelesTrak Keplerian elements for most satellites in low-earth orbit.
		Real-time ISS Shuttle Data NASA information on the International Space Station's whereabouts, Keplerian elements for the ISS and Shuttle, and sighting prediction information.
		Also available are Keplerian elements in several formats, updated weekly.
	www.serebella.com /encyclopedia/article-Keplerian.html (174 words)

	Doppler Tomogram Analysis
		Recall that the outermost solid circle on this grid represents the maximum Keplerian velocity at the surface of the primary star.
		The innermost circle represents the minimum circular, Keplerian velocity at the critical Roche lobe of the primary star.
		The velocity components of emission regions within the disk are not expected to be greater than the Keplerian velocity at the surface of the primary, nor less than that at the Roche lobe of the primary.
	mintaka.sdsu.edu /faculty/quyen/node28.html (1588 words)

	Keplerian Elements
		Keplerian data are most commonly provided in the AMSAT and the Space Command / NASA Two-Line Element (TLE) format.
		Current Keplerian elements are available for selected Manned, Amateur Radio, Meteorological, Navigation, Communications, and High Interest satellites in the standard NORAD/NASA Two-Line Element (TLE) format.
		Keplerian elements provide tracking software with the information needed to compute satellite positions and velocities
	www.mindspring.com /~n2wwd/html/body_keplerian_elts.html (118 words)

	Interpretation of a Doppler Map
		The solid-line trajectory, extending left of the secondary star's Roche lobe, is the free-fall velocity path of the stream, while the dashed-line trajectory is the Keplerian image of this path.
		Using these corresponding Keplerian velocities, another theoretical velocity trajectory can be mapped on the Doppler tomogram corresponding to the calculated Keplerian velocities along the stream.
		This trajectory, called the Keplerian image of the stream, is marked by dashed-line to the left of the secondary star's Roche lobe.
	mintaka.sdsu.edu /faculty/quyen/node24.html (1085 words)

	Rotation Curves (Site not responding. Last check: 2007-11-05)
		For example, a very centrally condensed system is the Solar System where 99.9 % of the mass is in the Sun and all of the other bodies orbit around the Sun in orbits whose sizes are much greater than the radius of the Sun.
		For galaxies, Keplerian orbits would arise for objects which were outside of the main concentration of mass of the galaxy.
		In all cases, the rotation curves of spiral galaxies are roughly flat with no evidence of Keplerian fall-offs.
	zebu.uoregon.edu /~imamura/209/apr24/theory.html (261 words)

	A Keplerian Mars Tropical Year (Site not responding. Last check: 2007-11-05)
		It is possible to define a mean tropical year based on the Keplerian Model because the Equinoxes fall within a slowly changing position (angle) in the orbit.
		Perhaps the most evident coincidence is the definition of January 1st as an angle relative to the Keplerian orbit.
		Comparison of the mean Keplerian Model with the planet positions from DE405 yields the opinion that the Keplerian Model is not sufficiently accurate to establish the Mars Tropical Year or the Calendar that would result.
	pweb.jps.net /~gangale3/weidner/kepleryear.html (198 words)

	The Astrophysics Spectator: Energetics of Keplerian Accretion Disks
		For a steady-state thin accretion disk, it is easy to place a lower limit on the surface temperature of the disk at each radius.
		In a steady state accretion disk, the gravitational potential energy released as mass flows inward must be counterbalanced by the energy carried away as radiation.
		For a Keplerian disk, the combined gravitational potential energy and orbital kinetic energy of a particle (electron, hydrogen atom, etc.) orbiting the central object is given by
	www.astrophysicsspectator.com /background/survey/galactic/DisksAccretionKeplerianEnergetics.html (857 words)

	Explaining Galaxy Arm Stability / Apparent Rotation Inconsistencies
		Even though this Arm-axial force vector is apparently smaller in magnitude than the Central force vector, its orientation of permanently acting to increase the magnitude of the velocity vector allows it to have considerable cumulative long-term effect.
		Keplerian Physics predicts that the outer portions of the Spiral Arms should be moving at proportionally slower velocities, but empirical evidence has shown just the reverse, that they move at faster velocities than stars in the Arms nearer the Central Core.
		Since we are demonstrating that the Sun's velocity of revolution is actually the sum of two components, the Keplerian Central force and a Net Forward along-Arm force, this implies that the Keplerian velocity alone would be less.
	mb-soft.com /public/galaxy.html (11775 words)

	File Library at Channel 1: Ham Radio (Site not responding. Last check: 2007-11-05)
		Keplerian data update both NASA 2 line and AMSAT verbose versions.
		Keplerian Elements, both NASA 2 line and AMSAT verbose + STS78 Rev. 132 (both) for satellite tracking programs.
		Keplerian elements for satellite tracking programs; both AMSAT verbose and NASA 2-line versions.
	www.filelibrary.com /Contents/DOS/30/5.html (498 words)

	Moon and Sun keps FAQ (Site not responding. Last check: 2007-11-05)
		One method of giving this orbital data is called "Keplerian elements" (another method were the "Delaunay elements").
		A second problem with "Keplerian elements" for the moon is that the moon's orbit is severely perturbed in a way a ordinary satellite tracking program cannot handle.
		It asks for the year (4 digits) and computes a set of Keplerian elements for the moon for every month of that given year.
	www.physics.usyd.edu.au /~ptitze/amsatvk/moonsunfaq.html (718 words)

	Astron. Astrophys. 336, 791-801 (1998) (Site not responding. Last check: 2007-11-05)
		Sketch of the potential vorticity contours in a Keplerian rotating disk with a initial disturbance (left) and the same disturbance after a while (right).
		Because the potential vorticity is mainly advected with the Keplerian flow inflection points of potential vorticity form naturally.
		To show the instability more clearly, the data at 9.6 and 11.2 orbital periods is plotted as a square with angle along the horizontal and radius along the vertical axis.
	aa.springer.de /papers/8336002/2300791/sc4.htm (3137 words)

	Hawley: Introduction
		The constant or near-constant specific angular momentum distribution of the initial torus rapidly evolves to one that is near Keplerian.
		The main focus for dynamical studies would therefore seem to be Keplerian disks, both hot (high internal sound speed), and thin and cold (low internal sound speed).
		So far there have been fewer simulations of Keplerian disks with low internal sound speeds corresponding to small H/R. To sidestep the difficulty of resolving both H and R, the cylindrical disk limit has been employed which omits vertical gravity and stratification.
	www.astro.virginia.edu /VITA/papers/cylinder/section1.html (1108 words)

	Mailgate: sci.astro.satellites.visual-observe: Lacrosse satellites outdated elements (Site not responding. Last check: 2007-11-05)
		I download keplerian elements for my tracking software regularly (about every 2-3 days).
		When I looked at the age of the ISS keplerian elements, it was OK - about one day and several hours.
		However, all the keplerian elements of the Lacrosse type satellites haven't been updated for more than 30 days so far.
	mailgate.supereva.it /sci/sci.astro.satellites.visual-observe/msg02063.html (165 words)

	orbit concept from the Astronomy knowledge base (Site not responding. Last check: 2007-11-05)
		Keplerian orbit (6 facts) (osculating orbit) - The path that an orbital body (e.g., a planet) would follow if it were subject only to the inverse-square attraction of the Sun or other central body.
		In practiced secondary bodies, such as Jupiter, produce perturbations., The orbit of a spherical particle of a finite mass around another spherical particle, also of finite mass, by virtue of the gravitational attraction between them.
		In the Bohr-Sommerfeld picture of atoms, the electrons are considered as describing Keplerian orbits in the field of the positive nucleus by virtue of the inverse square electric attraction between the electrons and the nuclei.
	www.site.uottawa.ca:4321 /astronomy/orbit.html (136 words)

	Astron. Astrophys. 356, 612-618 (2000) (Site not responding. Last check: 2007-11-05)
		For masses close to the maximum mass of static configurations the ISCO frequencies for static and Keplerian configurations are similar.
		However, for masses significantly lower than the maximum mass of static configurations, the minimum value of the ISCO frequency is reached in the Keplerian limit.
		Presence of a solid crust increases the ISCO frequency for the Keplerian configuration by about ten percent compared to that for a bare strange star of the same mass.
	aa.springer.de /bibs/0356002/2300612/small.htm (375 words)

	How NASA Studies Air
		The argument (argument meaning angle) of perigee-- perigee is the point on an orbital path when the satellite is closest to the Earth--is the angle (measured from the center of the Earth) from the ascending node to perigee.
		In the Keplerian orbit model, the satellite orbit is an ellipse, with eccentricity defining the "shape" of the ellipse.
		One of the six Keplerian elements, it indicates the angle of the orbit plane to the central body's equator.
	kids.mtpe.hq.nasa.gov /glossary.html (17170 words)

	Magnetic Helix Formation Driven by Keplerian Disk Rotation (Site not responding. Last check: 2007-11-05)
		Authors: Li, H., Lovelace, R.V.E., Finn, J.M., Colgate, S.A. We study the evolution of a magnetic arcade that is anchored to an accretion disk and is sheared by the differential rotation of a Keplerian disk.
		By including an extremely low external plasma pressure at large distances, we obtain a sequence of axisymmetric magnetostatic equilibria and show that there is a fundamental difference between field lines that are affected by the plasma pressure and those are not (i.e., force-free).
		We discuss the difficulty with adding a large number of twists within the limitations of the magnetostatic approximation.
	astrosun.tn.cornell.edu /us-russia/ABS/ab_01_07.htm (284 words)

	[18.12] Comparison of Results from Keplerian and Newtonian Fits to Radial Velocity Data (Site not responding. Last check: 2007-11-05)
		There are about 10 known extrasolar planetary systems in which the presence of at least two planets in orbit about a main sequence star has been inferred from the reflex motion of the central star.
		In all the initial models of the radial velocities of the stars in these systems, it has been assumed that the planets travel on unperturbed Keplerian orbits.
		I compare the orbital parameters from the Keplerian fits with those from the Newtonian fits.
	www.aas.org /publications/baas/v35n4/dps2003/361.htm (228 words)

	Orbital element (Site not responding. Last check: 2007-11-05)
		There are seven degrees of freedom in this model (time, position in 3-space at that time, velocity in 3-space at that time) soall sets of orbital elements have seven parameters.
		Other orbital parameters, such as the semi-major axis, can then be calculated fromthe Keplerian elements.
		Because the simple Newtonian model of orbital motion of idealized points in free space is not exact, the orbital elements ofthe orbits of real objects tend to change over time.
	www.therfcc.org /orbital-element-124088.html (280 words)

	Keplerian Elements Tutorial
		In the Keplerian model, satellites orbit in an ellipse of constant shape and orientation.
		The Earth is at one focus of the ellipse, not the center (unless the orbit ellipse is actually a perfect circle).
		In the Keplerian orbit model, the satellite orbit is an ellipse.
	www.amsat.org /amsat/keps/kepmodel.html (2793 words)

	Stellar Wind and Keplerian Disk Interactions in Hot Stars (Site not responding. Last check: 2007-11-05)
		We investigate the interaction between a stellar wind that has been equatorially directed due to rotation and a pre-existing Keplerian circumstellar disk.
		For Be stars, this timescale is less than a year, indicating that a Keplerian disk cannot persist around a Be star unless it is constantly replenished.
		Interestingly, the timescale to clear a hole out to the radius of the ring by wind induced accretion/ablation is of order $10^7$ years, so this mechanism may also be a viable candidate for producing the midplane ring.
	www.aas.org /publications/baas/v27n2/aas186/abs/S2205.html (397 words)

Try your search on: Qwika (all wikis)