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Topic: Orbital parameters


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 Orbit - Open Encyclopedia   (Site not responding. Last check: 2007-10-12)
The gravity of the orbiting object raises tidal bulges in the primary, and since below the synchronous orbit the orbiting object is moving faster than the body's surface the bulges lag a short angle behind it.
When atomic structure was first probed experimentally early in the twentieth century, an early picture of the atom portrayed it as a miniature solar system bound by the coulomb force rather than by gravity.
This was inconsistent with electrodynamics and the model was progressively refined as quantum theory evolved, but there is a legacy of the picture in the term orbital for the wave function of an energetically bound electron state.
open-encyclopedia.com /Orbit   (2408 words)

  
 Encyclopedia: Orbital elements   (Site not responding. Last check: 2007-10-12)
Inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit and is the angular distance of the orbital plane from the plane of the reference (usually planets equator or the ecliptic), stated in degrees.
The Longitude of the ascending node () is one of the orbital elements used to specify the orbit of an object in space.
In the study of orbital dynamics the mean anomaly is a measure of time, specific to the orbiting body p, which is a multiple of 2π radians at and only at periapsis.
www.nationmaster.com /encyclopedia/Orbital-elements   (969 words)

  
 Inclination - Wikipedia, the free encyclopedia
In particular, the inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit.
It is the angular distance of the orbital plane from the plane of reference (usually the primary's equator or the ecliptic), normally stated in degrees.
The inclination of distant objects, such as a binary star, is defined as the angle between the normal to the orbital plane and the direction to the observer, since no other reference is available.
www.wikipedia.org /wiki/Inclination   (412 words)

  
 Orbital elements - Wikipedia, the free encyclopedia
The true anomaly or, rarely, the eccentric anomaly are sometimes used instead of the mean anomaly.
Keplerian elements can be obtained from orbital state vectors using VEC2TLE software or by some direct computations.
Orbital positions and heights can be calculated from TLEs through the SGP/SGP4/SDP4/SGP8/SDP8 algorithms.
en.wikipedia.org /wiki/Orbital_element   (433 words)

  
 Orbital Parameters   (Site not responding. Last check: 2007-10-12)
Determination of orbital parameters of interacting galaxies using a genetic algo...
Determination of the orbital parameters of the M 51 system using a genetic algor...
Studies of orbital parameters and pulse profile of the accreting millisecond pul...
www.scienceoxygen.com /aviation/226.html   (171 words)

  
 DSRS Satellite Orbital Parameters Explained   (Site not responding. Last check: 2007-10-12)
The orbital parameters provided by Dundee Satellite Receiving Station are formatted as 14-element records, one per line.
The angle in the orbital plane from the ascending node to the point of perigee in the direction of the satellite's motion.
The angle on the orbital plane from the point of perigee to the position of the satellite in the direction of the satellite's motion.
www.sat.dundee.ac.uk /params.html   (284 words)

  
 NOAA Paleoclimatology Program - Orbital Variations and Milankovitch Theory
Orbital changes occur over thousands of years, and the climate system may also take thousands of years to respond to orbital forcing.
Recent Calculations of Earth Orbital Parameters and Insolation by A. Berger are archived at the WDC Paleo.
If the earth's axis were "straight up and down" relative to the orbital plane, as in the right-hand image, there would be no seasons, since every point on the earth would receive the same amount of sun each day of the year.
www.ngdc.noaa.gov /paleo/milankovitch.html   (862 words)

  
 Chapter 5 -- Orbital Mechanics   (Site not responding. Last check: 2007-10-12)
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 orbital change will occur only if the thrust is unbalanced, in other words, it causes the spacecraft to move in a single direction and is not countered by an opposing thruster to cause rotation around an axis.
www.space.edu /projects/book/chapter5.html   (5633 words)

  
 The Apollo Flight Journal - Lunar Orbit Rendezvous
The third concept deals with another type of orbital change, when a spacecraft is orbiting in one plane (for example, inclined 28° relative to the equator, as is the case in many launches from Cape Kennedy) wishes to change to another (say, 51 degrees, which is standard for most Russian launches).
The timing and parameters of this plane change were such that the CSM and LM would be essentially in the same plane at the nominal liftoff time, reducing the propellant demands and workload on an already packed schedule.
Liftoff and orbital insertion are the same as the coelliptic method, and the LM is placed in a 9 x 45 nautical mile (17 x 83-km) orbit.
history.nasa.gov /afj/loressay.htm   (8334 words)

  
 [No title]
The sizes of the orbits and the orbital speeds are all to scale, but the sizes of the Sun and planets are not.
But they model all the orbits on the orbital plane of the Earth and ignore the fact that the planes of the orbits differ from the plane of the Earth from about 1 to 3.5 degrees (except for Mercury’s orbit which deviates by 7 degrees).
The parameter i represents the angle between the plane of the orbit of the comet or asteroid and the plane of the Earth's orbit.
www.nd.edu /%7Elearning/orbital   (1712 words)

  
 Orbital Symbolism
They are "crude" and "wild", with a tendency to be aggressive, but --unlike Pluto-- their orbits are "sick" and "tremble", destined to be transformed or die as a result of their crossing the paths of the giant planets.  They are therefore related to pain and to death, but also to rapture, unconditioning, and freedom.
I like to use the words "orbital gesture", and compare it with the movement of the hands and arms when someone is speaking.  It is not conceptual, but similar to listening to music.
Pluto also made us aware of the possible meaning of orbital inclination, and is in fact the model and the fore-bearer of all centaurs, which are considered to have physically originated in the same region of space as Pluto.
www.expreso.co.cr /centaurs/essays/paradigm.html   (2483 words)

  
 chapter 8
If we tabulate the orbital and spin periods of all the bodies in the solar system, we find that many of the periods are commensurable, indicating the existence of a number of resonance effects between mutually coupled resonators.
The orbital pattern of Toro librates relative to the Earth, but for the sake of clarity the Earth is depicted as librating in relation to the orbital pattern of Toro.
The Jovian satellites 8, 9, and 11 have periods that are close to 1:6 of the orbital period of Jupiter; for 12 the ratio is close to 1:7.
history.nasa.gov /SP-345/ch8.htm   (4832 words)

  
 Baikonur LC1
Soyuz 19 initial orbital parameters were 220.8 by 185.07 kilometres, at the desired inclination of 51.80°, while the period of the first orbit was 88.6 minutes.
Transported to the Mir orbital station a Soviet-Afghan crew comprising the cosmonauts V A Lyakhov, V V Polyakov and A A Momand (Afghanistan) to conduct joint research and experiments with the cosmonauts V G Titov and M K Manarov.
Transported to the Mir orbital station of a crew comprising the cosmonauts V M Afanasev, Y V Usachev, and V V Polyakov for the fifteenth main expedition.
www.astronautix.com /sites/baiurlc1.htm   (16338 words)

  
 Orbital elements -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-12)
The traditionally used set of orbital elements is called the set of Keplerian elements, after (German astronomer who first stated laws of planetary motion (1571-1630)) Johannes Kepler and his (Click link for more info and facts about Kepler's laws) Kepler's laws.
Keplerian elements can be obtained from (Click link for more info and facts about orbital state vectors) orbital state vectors using VEC2TLE software or by some direct direct computations.
Other orbital parameters, such as the (Click link for more info and facts about semi-major axis) semi-major axis, can then be calculated from the Keplerian elements.
www.absoluteastronomy.com /encyclopedia/o/or/orbital_elements.htm   (520 words)

  
 Earth's Orbital Parameters
Orbital parameters used in climate models are based on the work of Andre L. Berger.
Berger's orbital parameters are considered to be valid for approximately 1 million years.
Calculates the three orbital parameters as a function of year.
aom.giss.nasa.gov /srorbpar.html   (236 words)

  
 Orbital Parameters   (Site not responding. Last check: 2007-10-12)
It shows three orbit parameters that can be used to define the shape and size of an orbit.
The parameters shown are radius (R), velocity (V), and inclination (I).
By changing one of these parameters, you can recalculate the orbit to see, on an updated graphic, how the orbit would change as compared to the default or initial orbit.
liftoff.msfc.nasa.gov /academy/rocket_sci/orbmech/orbit/orbit.html   (168 words)

  
 Untitled Document   (Site not responding. Last check: 2007-10-12)
One of the more interesting parameters to track is the argument of periapsis, which can be use to determine the latitude of the point of periapsis passage.
Referring to the History of Orbital Parameters, we see that at the start of aerobraking the argument of periapsis was about 148.44 degrees.
Referring to the History of Orbital Parameters we can see that the semimajor axis (SMA) has also been decreasing as the orbit has become more circular over the aerobraking period.
mars.sgi.com /mgs/status/nav/orbparam.html   (227 words)

  
 SHMO- The Simple Huckel Molecular Orbital Theory Calculator   (Site not responding. Last check: 2007-10-12)
The theoretical basis for the method is described in Orbital Interaction Theory of Organic Chemistry, by A.
Orbitals are displayed as filled and open coloured circles.
Orbital selection is by clicking on the orbital energy display or step up/step down buttons.
www.chem.ucalgary.ca /SHMO/index.html   (285 words)

  
 Vegetation and soil feedbacks on the response of the African monsoon to orbital forcing in the early to middle Holocene   (Site not responding. Last check: 2007-10-12)
Vegetation and soil feedbacks on the response of the African monsoon to orbital forcing in the early to middle Holocene.
We find that replacing today's orbital forcing with that of the mid-Holocene increases summer precipitation by 12% between 15 and 22º N. Replacing desert with grassland, and desert soil with more loamy soil, further enhances the summer precipitation (by 6 and 10% receptively), giving a total precipitation increase of 28%.
When the simulated climate changes are applied to a biome model, vegetation becomes established north of the current Sahara/Sahel boundary, thereby shrinking the area of the Sahara by 11% owing to orbital forcing alone, and by 20% owing to the combined influence of orbital forcing and the prescribed vegetation and soil changes.
www.sage.wisc.edu /pubs/abstracts/kutzbachNature1996.html   (241 words)

  
 SPACEWARN Bulletin 600 | SpaceRef - Your Space Reference
Initial orbital parameters were period 105 min, apogee 1015 km, perigee 982 km, and inclination 99.5°.
Initial orbital parameters of Soyuz TMA 3 were period 92.2 min, apogee 384 km, perigee 376 km and inclination 51.6°.
Initial orbital parameters of the Sun-synchronous orbit were period 101.4 min, apogee 836 km, perigee 813 km, and inclination 98.8°.
www.spaceref.com /news/viewsr.html?pid=10958   (2551 words)

  
 Orbital Elements and Astronomical Terms
I have listed the orbital common terms, along with some terms that are occasionally encountered, and a brief explanation of each.
However: anyone interested in finding the positions of Earth orbiting satellites is likely to come upon a set of orbital parameters that are used in aerospace engineering that are slightly different from the standard set used in astronomy.
perigee (or perihelion), assuming that the satellite moved at a constant speed in a orbit on a circle of the same area as the actual orbital ellipse.
www.physics.ncsu.edu /courses/astron/orbits.html   (1217 words)

  
 SPACEWARN Bulletin Number 556 | SpaceRef - Your Space Reference
Initial orbital parameters of all four were similar: period 103.5 min, apogee 930 km, perigee 914 km, and inclination 52°.
The initial orbital parameters were period 91.6 min, apogee 353 km, perigee 348 km, and inclination 51.7°.
The orbital parameters of all these were nearly alike: period 100.4 min, apogee 805 km, perigee 750 km, and inclination 100.2°.
www.spaceref.com /news/viewpr.html?pid=1016   (2132 words)

  
 Astron. Astrophys. 343, 273-280 (1999)
The values found for the orbital elements confirm the deficiency of short periods and the lack of circular orbits for CP stars: only HD 15144 has an orbital period shorter than 3 days (the orbital period distribution of normal stars peaks at 3 days) and a circular orbit.
As O-A star binary systems have circular orbits only when their orbital periods are less than two days, we conclude that CP-star binary systems are characterised only by long orbital periods with respect to normal stars.
Probably a small component separation and/or a massive companion, which are associated with short orbital periods, is responsible for such a strong atmospheric mass motion on the stellar surface to prevent the element separation which is at the basis of the CP star phenomenon.
aa.springer.de /papers/9343001/2300273/small.htm   (380 words)

  
 Orbital element   (Site not responding. Last check: 2007-10-12)
Because there are multiple ways of defining a motion, depending on whichset of variable you choose to measure, there are several different ways of defining sets of orbital elements, each of which willdefine the same orbit.
Other orbital parameters, such as the semi-major axis, can then be calculated fromthe Keplerian elements.
In many cases, the semi-major axis is used as an orbital element instead of mean motion.
www.therfcc.org /orbital-element-124088.html   (280 words)

  
 [24.04] On the Dynamical State of New Multi-Planet Systems.   (Site not responding. Last check: 2007-10-12)
We show that the currently announced orbital parameters place these systems in very different situations from the point of view of dynamical stability.
Also there are a few stable configurations located not very far in the parameter space from the announced parameters of the system and associated with the 2:1 mean motion resonance.
The orbital parameters of the HD 12661 planets are located in a border region between stable and unstable dynamical regimes, so while its currently determined orbital parameters produce stable regular orbits, a minor change within the margin of error of just one parameter may result in a chaotic dynamical system.
www.aas.org /publications/baas/v34n4/aas201/462.htm   (305 words)

  
 DSRS Orbital Parameters   (Site not responding. Last check: 2007-10-12)
The following orbital parameters are calculated from orbital elements supplied by NASA / NORAD / Celestrak.
The file format is suitable for use with any DSS-supplied software such as predict, projcal, n1b, etc. The files contain all orbital elements from launch to the present day (until satellite failure), and so are suitable for processing both archive data and current data.
The file is directly suitable for use with DSS orbital prediction software, and is updated daily from either CelesTrak, NASA, NORAD, OIG or Space-Track.
www.sat.dundee.ac.uk /orb   (181 words)

  
 ASCA Orbital Parameters   (Site not responding. Last check: 2007-10-12)
The monthly oscillation of the parameters is due to lunar perturbations.
The steepening of the orbital decay around 1998 is due to the approaching solar maximum, which expands the Earth's outer atmosphere (c.f.
Reentry could be as early as 1999 November or as late as 2000 August, if the upcoming maximum is stronger or weaker than the last, respectively.
adfwww.gsfc.nasa.gov /asca/trendplots/orbit.html   (133 words)

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