#NGC2004 (also known as ESO 86-SC4) is an #openCluster of stars in the southern #constellation of #Dorado. It was discovered by Scottish astronomer #JamesDunlop on September 24, 1826. This is a young, massive cluster with an age of about 20 million years and 23,000 times the mass of the Sun. It has a #coreRadius of 2.85 ± 0.46 pc (9.3 ± 1.5 ly). NGC 2004 is a member of the #LargeMagellanicCloud, which is a #satelliteGalaxy of the #MilkyWay.