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'''Orbit''' is an MFD mode which lists the elements and parameters for the [[orbit]] of the ship's orbit in reference to a central body, and a graphical representation of the orbit. The mode can also show the orbit of a target body orbiting the same body and its orbital characteristics. Orbit may be selected from the MFD selection page.
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'''Orbit''' is an MFD mode which lists the elements and parameters for the orbit of the ship's orbit in reference to a central body, and a graphical representation of the orbit. The mode can also show the orbit of a target body orbiting the same body and its orbital characteristics. Orbit may be selected from the MFD selection page.
  
 
The display shows the Keplar, or two-body, orbit of the craft at the current date with respect to the reference body. Any natural body in Orbiter may be selected as the reference body. Because of perturbations to the orbit, it may change over time. Perturbing effects include other bodies in the Solar System, nonspherical gravity, atmospheric drag, and ship's engines, etc.
 
The display shows the Keplar, or two-body, orbit of the craft at the current date with respect to the reference body. Any natural body in Orbiter may be selected as the reference body. Because of perturbations to the orbit, it may change over time. Perturbing effects include other bodies in the Solar System, nonspherical gravity, atmospheric drag, and ship's engines, etc.
  
The orbital elements may be displayed in the [[Ecliptic|ecliptic]] or equatorial frame of reference. The plane of the ecliptic is the orbital plane of the Earth and the equatorial plane is the plane of the equator of the reference body. {{Key|Shift}}{{Key|F}} or the FRM button is used to switch back and forth between the reference frames, the 'Frm' value displays the current frame.
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The orbital elements may be displayed in the ecliptic or equatorial frame of reference. The plane of the ecliptic is the orbital plane of the Earth and the equatorial plane is the plane of the equator of the reference body. {{Key|Shift}}{{Key|F}} or the FRM button is used to switch back and forth between the reference frames, the 'Frm' value displays the current frame.
  
 
The graphical view can be switched between the planes of the ecliptic (ECL), equator (EQU), ship's orbit (SHP), or target's orbit (TGT) with {{Key|Shift}}{{Key|P}} or with the PRJ button. The radius vector of the ship and target can be displayed from orbit focus (indicated by Rad, ApR, PeR), or by altitude above mean planet radius (Alt, ApA, PeA) with {{Key|Shift}}{{Key|D}}, or the DST button.
 
The graphical view can be switched between the planes of the ecliptic (ECL), equator (EQU), ship's orbit (SHP), or target's orbit (TGT) with {{Key|Shift}}{{Key|P}} or with the PRJ button. The radius vector of the ship and target can be displayed from orbit focus (indicated by Rad, ApR, PeR), or by altitude above mean planet radius (Alt, ApA, PeA) with {{Key|Shift}}{{Key|D}}, or the DST button.
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Press {{Key|Shift}}{{Key|H}} or the HUD button to switch the HUD to display the orbit reference object.
 
Press {{Key|Shift}}{{Key|H}} or the HUD button to switch the HUD to display the orbit reference object.
  
<center>[[File:OrbitMFD.jpg|360 px]]    [[File:OrbitMFDGraphicMode.png|360 px]]    [[File:OrbitMFDListMode.png|360 px]]</center>
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[[File:OrbitMFD.jpg|360 px]]    [[File:OrbitMFDGraphicMode.png|360 px]]    [[File:OrbitMFDListMode.png|360 px]]
  
 
In the graphic mode:<br>
 
In the graphic mode:<br>
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•'''MnA''' indicates the mean anomaly of the orbit or the angle from the vernal equinox to the ship's position if the orbit was circular, the ship or target moved at constant speed, and having the same orbital period as the true orbit.<br>
 
•'''MnA''' indicates the mean anomaly of the orbit or the angle from the vernal equinox to the ship's position if the orbit was circular, the ship or target moved at constant speed, and having the same orbital period as the true orbit.<br>
 
•'''MnL''' indicates the mean longitude of the orbit or the angle from the vernal equinox to the ship's or target's position if it's orbit was circular and with no perterbations.<br>
 
•'''MnL''' indicates the mean longitude of the orbit or the angle from the vernal equinox to the ship's or target's position if it's orbit was circular and with no perterbations.<br>
 
==See also==
 
*[[w:Orbit|Orbit]] at Wikipedia.
 
  
 
[[Category:Articles]]
 
[[Category:Articles]]
 
[[Category:MFD]]
 
[[Category:MFD]]

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