Symbols:Z/Zenith Distance
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Zenith Distance
- $z$
Let $X$ be the position of a star (or other celestial body) on the celestial sphere.
The zenith distance of $X$ is defined as the angle subtended by the the arc of the vertical circle through $X$ between $X$ and the zenith.
It is often denoted by $z$.
Also denoted by
The zenith distance is also seen denoted by the Greek letter $\zeta$.
Sources
- 1976: W.M. Smart: Textbook on Spherical Astronomy (6th ed.) ... (previous) ... (next): Chapter $\text {II}$. The Celestial Sphere: $18$. Altitude and azimuth.