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NGC 416 is a globular cluster located in the constellation Tucana. It was discovered on September 5, 1826 by James Dunlop. It was described by Dreyer as "faint, pretty small, round, gradually brighter middle."[3] At a distance of about 199,000 ± 9,800 ly (61,000 ± 3,000 pc), it is located within the Small Magellanic Cloud.[3] At an aperture of 31 arcseconds, its apparent V-band magnitude is 11.42, but at this wavelength, it has 0.25 magnitudes of interstellar extinction.[2]

NGC 416
NGC 416 by Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationTucana
Right ascension01h 07m 58.5s[1]
Declination−72° 21′ 18″[1]
Distance199,000 ± 9,800 ly (61,000 ± 3,000 pc)[1]
Apparent magnitude (V)11.42[2]
Apparent dimensions (V)1.2′ × 1.2′[3]
Physical characteristics
Mass8.0×104[2] M☉
Estimated age6.60±0.80 Gyr[2]
Other designationsESO 029-SC 032.[1]
See also: Open cluster, List of open clusters

NGC 416 is about 6.6 billion years old. Its estimated mass is 8.0×104 M☉, and its total luminosity is 1.12×105 L☉, leading to a mass-to-luminosity ratio of 0.72 M☉/L☉.[2] All else equal, older star clusters have higher mass-to-luminosity ratios; that is, they have lower luminosities for the same mass.[2]


References


  1. "NASA/IPAC Extragalactic Database". Results for NGC 0416. Retrieved September 2, 2016.
  2. 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.
  3. "New General Catalog Objects: NGC 400 - 449". Cseligman. Retrieved February 11, 2017.


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[de] NGC 416

NGC 416 ist ein offener Sternhaufen in der 200.000 Lichtjahre entfernten kleinen Magellanschen Wolke im Sternbild Tukan. Das Alter des Haufens wird auf 2,5 Milliarden Jahre geschätzt.
- [en] NGC 416

[ru] NGC 416

NGC 416 (другое обозначение — ESO 29-SC32) — звёздное скопление[уточнить] в созвездии Тукан.


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