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." At a distance of about , it is located within the Small Magellanic Cloud. 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. NGC 416 is about 6.6 billion years old. Its estimated mass is , and its total luminosity is , leading to a mass-to-luminosity ratio of 0.72 /. All else equal, older star clusters have higher mass-to-luminosity ratios; that is, they have lower luminosities for the same mass. References External links 0416 18260905 Tucana (constellation) Small Magellanic Cloud Open clusters