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 is about 6.6 billion years old. Its estimated mass is 8.0×104M☉, and its total luminosity is 1.12×105L☉, 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]
Media related to NGC 416 at Wikimedia Commons
