How do i align to a round part with no edge?

How do i align to a round part with no edge?

What is the best way to align a round part with no cut edge or straight line to rotate off of? The part itself is tall enough to grab a cylinder but every time i try it that way everything gets skewed. I've also tried taking 2 points and creating a line but I'm getting the same result no matter how i try to rotate it.