We report the discovery of a new Milky Way satellite in the constellation Leo , identified in data from the Sloan Digital Sky Survey .
It lies at a distance of \sim 180 kpc , and is separated by \lesssim 3 ^ { \circ } from another recent discovery , Leo IV .
We present follow-up imaging from the Isaac Newton Telescope and spectroscopy from the Hectochelle fiber spectrograph at the Multiple Mirror Telescope .
Leo V ’ s heliocentric velocity is \sim 173.3 \pm 3.1 kms ^ { -1 } , offset by \sim 40 kms ^ { -1 } from that of Leo IV .
A simple interpretation of the kinematic data is that both objects may lie on the same stream , though the implied orbit is only modestly eccentric ( e \sim 0.2 )