NGC 1647 (also OCL 457 and Collinder 54) is a magnitude +6.4 open cluster located 1800 light-years away in the constellation Taurus. The cluster is 4° north of Aldebaran near the Pleiades open cluster. The cluster has an diameter of 23 light years, and an estimated age of 150 million years.
The cluster was discovered by German-British astronomer William Herschel using a 47.5 cm (18.7 inch) reflecting telescope at Datchet, Berkshire, on the 15th February 1784.
Right Ascension 04h 45m 42.2s, Declination +19° 07' 09"
