Object name: M073
M73 is a probable asterism of 4 stars in western Aquarius. It was discovered by Charles Messier on October 4, 1780 who realized it was just 4 stars. So why did he include it in his list? Messier gave us the answer when he wrote of finding M73: "Cluster of three or four small stars, which resembles a nebula at first glance, containing very little nebulosity; this cluster is located on the parallel [of declination] of the preceding [M 72]; its position has been determined from the same star [Nu Aquarii]." So he found it while logging nearby M72 and thought it possible someone with an inferior scope might see it as nebulous. while there he added it to the list.