Symbols:N/North Polar Distance
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North Polar Distance
- $\operatorname {N.P.D.} x$
The symbol used for the north polar distance of a point $x$ on the celestial sphere is $\operatorname {N.P.D.} x$.
The $\LaTeX$ code for \(\operatorname {N.P.D.} x\) is \operatorname {N.P.D.} x .
Sources
- 1976: W.M. Smart: Textbook on Spherical Astronomy (6th ed.) ... (previous) ... (next): Chapter $\text {II}$. The Celestial Sphere: $19$. Declination and hour angle.