Messier 103 (also known as M103, or NGC 581) is a small open cluster of many faint stars in Cassiopeia. It was discovered on 27 March 1781 by Pierre Méchain, but later added as Charles Messier’s last deep-sky object in his catalogue.
As for why the rudimentary compass was in the shape of a spoon, Silverman says the original diviners may have made the ladle shape to mimic the Big Dipper. In that constellation, the two stars at the end of the “bowl” point to the North Star. And since the spoon’s neck pointed south, that meant its bowl pointed north—just like the Big Dipper.