NGC 2157 (also ESO 57-SC58) is a magnitude +10.2 open cluster located in the constellation Dorado.
The cluster was discovered by Scottish astronomer James Dunlop using a homemade 9-foot, 22.86 cm (9 inch) f/12 speculum Newtonian reflector at Paramatta, New South Wales, Australia, on the 6th November 1826.
Right Ascension 05d 57h 34.9s, Declination -69° 11' 50"
