NGC 419

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
NGC 419 as seen by the Hubble Space Telescope
Credit: NASA/ESA Hubble
Observation data (J2000 epoch)
Right ascension01h 08m 17.2s[1]
Declination−72° 53′ 01″[1]
Distance186,000 ± 13,000 ly (57,000 ± 4,000 pc)[2]
Apparent magnitude (V)10.30[3]
Apparent dimensions (V)2.8′ × 2.8′[1]
Physical characteristics
Mass6.4×104[3] M☉
Estimated age1.45±0.05 Gyr[3]
Other designationsKron 58, Lindsay 85, ESO 29-33, LI-SMC 182, OGLE-CL SMC 159, RZ2005 174.[1]
Associations
ConstellationTucana

NGC 419 is about 1.45 billion years old. Its estimated mass is 6.4×104 M☉, and its total luminosity is 3.49×105 L☉, 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]

References
  1. "NGC 419". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 6 February 2017.
  2. "NASA/IPAC Extragalactic Database". Results for NGC 0419. Retrieved 2 September 2016.
  3. Song, 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.
  4. "New General Catalog Objects: NGC 400 - 449". Cseligman. Retrieved 19 February 2017.
  • Media related to NGC 419 at Wikimedia Commons


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