Definition:Declination/North
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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.
Also see
Sources
- 1976: W.M. Smart: Textbook on Spherical Astronomy (6th ed.) ... (previous) ... (next): Chapter $\text {II}$. The Celestial Sphere: $19$. Declination and hour angle.