Editing Orbital elements

Jump to navigation Jump to search

Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.

The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.

Latest revision Your text
Line 78: Line 78:
 
Reference:  
 
Reference:  
 
* Explanatory Supplement to the Astronomical Almanac. 1992. K. P. Seidelmann, Ed., University Science Books, Mill Valley, California.
 
* Explanatory Supplement to the Astronomical Almanac. 1992. K. P. Seidelmann, Ed., University Science Books, Mill Valley, California.
 
==Orbiter Elements==
 
<!-- 'Orbiter Elements' section added by Quick_Nick of the Orbiter Forum -->
 
Example:
 
<br>ELEMENTS 6731158 0.0004046 51.6412 163.8597 185.4817 215.0447 54745.343391
 
 
where
 
 
6731158 - Semi-major axis in meters.
 
<br>0.0004046 - Eccentricity.
 
<br>51.6412 - Inclination.
 
<br>163.8597 - Longitude of Ascending Node.
 
<br>185.4817 - Argument of Periapsis.
 
<br>215.0447 - Mean Anomaly.
 
<br>54745.343391 - Epoch in Modified Julian Date.
 
 
Note that the lack of a semi-major axis element or MJD epoch element means that conversion between TLE format and Orbiter's format requires a small amount of math.
 
 
<math>a = \sqrt[3]{(T\div2\pi)^2 \mu}</math>
 
 
<br>(The equation for <math>a</math> is based on ''T'' because ''T'' can be easily derived from the <br>number of seconds in a day divided by a TLE's 'Revolutions per Day' element.)
 
<br><br><math>a</math> is the semi-major axis in meters.
 
<br><math>\mu</math> is the standard gravitational parameter. (398,600,441,800,000 <math>m^3s^{-2}</math> on Earth)
 
<br>''T'' is the orbital period in seconds.
 
<!-- 'Orbiter Elements' section added by Quick_Nick of the Orbiter Forum -->
 
  
 
==See also==
 
==See also==
Line 117: Line 92:
 
* [http://celestrak.com/columns/v04n03/ Celestrak Two-Line Elements FAQ]
 
* [http://celestrak.com/columns/v04n03/ Celestrak Two-Line Elements FAQ]
  
[[Category: Articles]]
+
 
 
[[Category:Glossary]]
 
[[Category:Glossary]]

Please note that all contributions to OrbiterWiki are considered to be released under the GNU Free Documentation License 1.2 (see OrbiterWiki:Copyrights for details). If you do not want your writing to be edited mercilessly and redistributed at will, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource. Do not submit copyrighted work without permission!

To protect the wiki against automated edit spam, we kindly ask you to solve the following hCaptcha:

Cancel Editing help (opens in new window)