Leo I is a dwarf spheroidal galaxy in the constellation Leo. At about 820,000 light-years distant, it is a member of the Local Group of galaxies and is thought to be one of the most distant satellites of the Milky Way galaxy.

Apparent mass: ~0.02 billion M☉

Magnitude: 11.2

Constellation: Leo

Apparent magnitude (V): 11.2

Apparent size (V): 9′.8 × 7′.4

Redshift: 285 ± 2 km/s