Flamsteed designation

A Flamsteed designation is a combination of a number and constellation name that uniquely identifies most naked eye stars in the modern constellations visible from southern England. They are named for John Flamsteed who first used them while compiling his Historia Coelestis Britannica. (Flamsteed used a telescope,^[1] and the catalog also includes some stars which are relatively bright but not necessarily visible with the naked eye.)