Leo IV
Leo IV is one of the smallest and faintest satellites of the Milky Way; its integrated luminosity is about times that of the Sun (absolute visible magnitude of ), which is much lower than the luminosity of a typical globular cluster. However, its mass is about 1.5 million solar masses, which means that Leo's mass to light ratio is around 150. A high mass to light ratio implies that Leo IV is dominated by the dark matter.