Category:North Polar Distance
Jump to navigation
Jump to search
This category contains results about North Polar Distance.
Definitions specific to this category can be found in Definitions/North Polar Distance.
Consider the celestial sphere $C$ with observer $O$.
Let $X$ be a point on $C$.
Let $X$ have declination of $\delta$.
The north polar distance of $X$, denoted $\operatorname {N.P.D.} x$, is defined as:
- $\operatorname {N.P.D.} x = 90 \degrees - \delta$
That is, the north polar distance of $X$ length of the arc from the north celestial pole $P$ along the vertical circle through $X$.
This category currently contains no pages or media.