An illustration of some of the orbital elements that establishes the position of an object in freefall around a central attractive force.
Source
Image:Orbit.png
Date
07-August-2006 (Current revision)
Author
Arpad Horvath based on an image created by Urhixidur: Image:Orbit.png
Permission
Creative Commons 2.5
Other versions
w:Image:orbit.png
Revision comment
The earlier version of Orbit.svg labeled True anomaly incorrectly as Mean anomaly. This version corrects that. With this change, the illustration still serves the articles it supports since there is some flexibility in presenting certain orbital elements. In particular, one has flexibility in expressing where an object is at a particular time. Based on a patient reading of orbital elements, one may state a time, the 'epoch', and use the other elements to work out the position. One may also state a position and use this with the other elements to work out the time since periapsis passage. Here true anomaly, a rotation of a vector rooted at the focus and measured from periapsis, serves as such a position. Since we are not obliged to illustrate mean anomaly, it seemed easier to just relabel this diagram correctly. Such a change is easy since Arpad Horvath furnished an SVG file. With this change, I believe I've addressed the issues raised by myself and and can remove the 'Caveat' and cleanup request tag. What I haven't addressed is the corresponding changes to Image:Orbit_hu.svg. Alas, my command of Hungarian is suspect and trust that Arpad Horvath might rise to the occasion. -- Garry R. Osgood 22:06, 7 August 2006 (UTC)
About figure
Made by Arpad Horvath with Inkscape. I made the svg copy of en:Image:Orbit.png with some modification.
In other languages:
Hungarian: Image:Orbit_hu.svg
Licensing
I, the author of this work, hereby publish it under the following license:
Inclination in general is the angle between a reference plane and another plane or axis of direction. ... A diagram of Keplerian orbital elements. ... The elements of an orbit are the parameters needed to specify that orbit uniquely, given a model of two ideal masses obeying the Newtonian laws of motion and the inverse-square law of gravitational attraction. ... The Longitude of the ascending node () is one of the orbital elements used to specify the orbit of an object in space. ... The argument of periapsis (ω) is the orbital element describing the angle between an orbiting bodys 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... An orbital node is one of the two points where an inclined orbit crosses a plane of reference (e. ...
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