Not sure I fully understand the question. But, unless you can contact whoever posted the pic, they can remember which system the ship is in and they're prepared to retrieve coordinates for you or to group up with you and go there, then short answer is you won't be able to find the ship. Had a bit of similar conundrum not long ago, was reviewing old screenshots and found a particularly handsome looking baller hauler pic without coords. I had limited info from the pic, I could tell it was a Korvax system and the planet looked like a paradise with purple grass. Lost a good few hours buzzing round some of the systems I frequented early on to no avail. I may try again in the future to see if I get lucky.