It would actually be the planet-moon-star pirate point.
True, I was mainly going with which two bodies it is between. Saying Planet-Moon vs Planet-Star allows faster understanding of which location is being referred to, otherwise I might hear planet-moon-star, only pay attention to the first and last words, and get the wrong location.
The other idea might be phrasing them as (largest body in the pair) - (smaller body in the pair), to put them in a logical order and have even less chance of making a mistake. I.e. if you hear Star-Planet but the first part is garbled, you would know that you heard the word planet followed by silence and not think that planet-moon pirate point is being referred to.
This could be a fun for developing a spacer terminology (unless
Jovian Chronicles has already done the work)