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SS 433. B - V = +2.0. Associated with the SNR W 50. Mean
light varies in the range 14.0 - 14.6 V according to the
elements Max = 2443662.5 + 165.5d*E [00512]. The depth of
Min I varies from 0.2m to 0.9m V, the depth of Min II
varies from 0 to 0.4m V. Two systems of H, HeI, HeII
emission lines are observed in the spectrum: the
"""stationary"" system corresponding to Vr changes from 300"
"to 150 km/s with P = 13.1d, and the ""relativistic"" one,"
corresponding to Vr changes from +50000 to -35000 km/s
with P = 165.5d. The spectral study [00535]. The system
apparently consists of an O - B star filling its inner
Roche lobe and a compact object surrounded by an accretion
disc wich is precessing with P = 165.5d. Two jets
consisting of dense condensations of matter emerge from
the system with relativistic velocity (0.27 c) in opposite
directions. The luminosity of the disc amounts to not less
than 60% of the total luminosity of the system [00926, 00953].
The object may be a former supernova which bursted not
more than 10**4 years ago.
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