Editing Orbital inclination (section)

==Calculation==
[[Image:Orbital inclination from momentum vector.gif|thumb|Components of the calculation of the orbital inclination from the momentum vector]]
In [[astrodynamics]], the inclination <math>i</math> can be computed from the [[orbital momentum vector]] <math>h</math> (or any vector perpendicular to the [[Orbital plane (astronomy)|orbital plane]]) as
<math display="block">i = \arccos \frac{h_z}{\left|h\right|}</math>
where <math>h_z</math> is the z-component of <math>h</math>.

Mutual inclination of two orbits may be calculated from their inclinations to another plane using [[Spherical law of cosines|cosine rule for angles]].