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 H i line with the Giant Metrewave Radio Telescope ( GMRT ) .
The pair components have absolute blue magnitudes -16.0 and -13.2 , heliocentric radial velocities 1799 km/s and 1842 km s ^ { -1 } , 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 M _ { \sun } L _ { \sun } ^ { -1 } and a short crossing time of 0.22 Gyr .