Definition:Declination/North

Definition
Consider the celestial sphere $C$ with observer $O$.

Let $X$ be a point on $C$.

Let $DX$ be the declination of $X$.

If $X$ is in the northern celestial hemisphere, $DX$ is north declination.


 * Celestial-Sphere-with-Declination.png

Also see

 * Definition:South Declination