NGC 419 is a globular cluster located approximately 57,000 pc (190,000 ly) from Earth in the constellation Tucana. It was discovered on September 2, 1826 by James Dunlop. It was described by Dreyer as "pretty large, pretty bright, round, gradually brighter middle."[4] At a distance of about 186,000 light years (57,000 parsecs), it is located within the Small Magellanic Cloud.[2] At an aperture of 50 arcseconds, its apparent V-band magnitude is 10.30, but at this wavelength, it has 0.15 magnitudes of interstellar extinction.[3]
NGC 419 is about 1.45 billion years old. Its estimated mass is 6.4×104M☉, and its total luminosity is 3.49×105L☉, leading to a mass-to-luminosity ratio of 0.18 M☉/L☉.[3] All else equal, older star clusters have higher mass-to-luminosity ratios; that is, they have lower luminosities for the same mass.[3]
^ abcdefSong, Ying-Yi; Mateo, Mario; Bailey, John I.; Walker, Matthew G.; Roederer, Ian U.; Olszewski, Edward W.; Reiter, Megan; Kremin, Anthony (2021). "Dynamical masses and mass-to-light ratios of resolved massive star clusters – II. Results for 26 star clusters in the Magellanic Clouds". Monthly Notices of the Royal Astronomical Society. 504 (3): 4160–4191. arXiv:2104.06882. doi:10.1093/mnras/stab1065.{{cite journal}}: CS1 maint: unflagged free DOI (link)
Media related to NGC 419 at Wikimedia Commons
