SL 517

SL 517 (also known as NGC 2002 and ESO 86-SC3) is an open cluster located in the Large Magellanic Cloud.

NGC 2002 contains five red supergiants. Together with the main sequence turnoff, these tightly constrain the age of the cluster to 18 million years. The cluster shows strong stellar stratification with the brightest stars concentrated at the centre of the cluster and fainter stars dominating further out.