A list plot of the zeros of the imaginary part of $2^s\pi^{s-1}\sin\bigg(\frac{\pi s}{2}\bigg)\Gamma(1-s)$ for $s=\frac{1}{2}+it$
looks like this:

How would I find the expression for the line that runs through these points?
A list plot of the zeros of the imaginary part of $2^s\pi^{s-1}\sin\bigg(\frac{\pi s}{2}\bigg)\Gamma(1-s)$ for $s=\frac{1}{2}+it$
looks like this:

How would I find the expression for the line that runs through these points?