What kind of celestial system is SS433?

SS433 is classified as an X-ray binary system. This designation is based on the system's characteristics that include a compact object, likely a black hole or neutron star, which is accreting matter from a companion star. The intense gravitational field of the compact object causes the surrounding material to heat up and emit X-rays, which is a defining feature of X-ray binaries.

In the case of SS433, it was discovered that the system exhibits unique properties, such as the presence of superluminal jets that are ejected from the region around the compact object at a significant fraction of the speed of light. These jets are a result of the accretion process and the interaction of material with the intense magnetic fields and gravity of the compact object.

While SS433 does represent a binary star system, the specific classification as an X-ray binary emphasizes the active processes involving intense X-ray emissions and mass transfer between the stars, which differentiates it from simply being any binary star system without such significant X-ray activity. Other options like Type Ia supernovae, planetary nebulae, and simple binary star systems do not accurately reflect the energetic processes and observations associated with SS433.