Symbols:Q/Parallactic Angle

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Parallactic Angle

$q$

Used to denote the parallactic angle of a point on the celestial sphere.


Let $x$ be a point on the celestial sphere.

Let $\SS_1$ be the arc of the great circle between $x$ and the zenith.

Let $\SS_2$ be the arc of the great circle between $x$ and the north celestial pole.


The parallactic angle is defined as the (spherical) angle between $\SS_1$ and $\SS_2$.


The $\LaTeX$ code for \(q\) is q .


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