NGC 2004

NGC 2004 (also known as ESO 86-SC4) is an open cluster of stars in the southern constellation of Dorado. It was discovered by Scottish astronomer James Dunlop on September 24, 1826.^[6] This is a young, massive cluster with an age of about 20 million years and 23,000 times the mass of the Sun.^[5] It has a core radius of 2.85 ± 0.46 pc (9.3 ± 1.5 ly).^[7] NGC 2004 is a member of the Large Magellanic Cloud,^[4] which is a satellite galaxy of the Milky Way.

NGC 2004
Hubble Space Telescope image of NGC 2004
Observation data (J2000 epoch)
Right ascension	05h 30m 41.340s[1]
Declination	−67° 17′ 21.83″[1]
Distance	163.1 ± 0.3 ly (50 ± 0.1 pc)[2]
Apparent magnitude (V)	9.6[3]
Apparent dimensions (V)	3.0' × 2.8'[4]
Physical characteristics
Mass	~2.3×104[5] M☉
Estimated age	20 Ma[5]
Other designations	NGC 2004, ESO 86-SC4[3]
Associations
Constellation	Dorado
See also: Open cluster, List of open clusters