M60-UCD1's dynamical mass is million
solar masses (). Their
metallicity is similar to that of the
Sun. The orbital velocity dispersion of the innermost stars exceeds 100 km/s, With this proportion of the mass of the black hole to that of the whole galaxy, it is one of the most black hole dominated galaxies known. As of 2013, it is possibly the densest known
galaxy with over one hundred stars per cubic light-year. As of 2014, it is the smallest and least massive galaxy known to host a
central black hole. It was previously known as the most massive ultracompact dwarf galaxy known. ==See also==