  We report on discovery of unique binary system of dIr galaxies which looks
like a low surface brightness tidal stream in the halo of another dwarf galaxy.
Both the galaxies are detected in the HI line with the Giant Metrewave Radio
Telescope (GMRT). The pair components have absolute blue magnitudes -16.0 and
-13.2, heliocentric radial velocities 1799 and 1842 km/s, and hydrogen
masses-to-luminosity ratios 0.4 and 1.6 in solar units, respectively. The
binary system is characterized by a high orbital mass-to-luminosity ratio of 49
in solar units and a short crossing time of 0.22 Gyr.
