AN EXTENDED DISC AROUND SS-433

Observational implications of heavy mass loss by the SS 433 system are considered. The gas flowing out through the outer Lagrangian point forms a disc-like envelope (extended disc) which is illuminated by the precessing accretion disc of SS 433. The extended disc has the shape of a double cone, whose surface brightness at about 1 arcsec scale is sufficient for the disc to be detected by the Hubble Space Telescope and probably by a ground-based telescope. At a distance r < 0.15 arcsec from SS 43 3, one might expect to find a spiral-like structure in the extended disc, which could be variable in the course of precession. Some evidence for outflowing gas streams near the system is discussed.