SS 433
Star system
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SS 433 is a microquasar or eclipsing X-ray binary system, consisting of a stellar-mass black hole accreting matter from an A-type companion star. SS 433 is the first discovered microquasar. It is at the centre of the supernova remnant W50. Wikipedia
Declination: +04° 58′ 57.8″
Apparent magnitude (V): 12.634
Constellation: Aquila
Distance: 18,000±700 ly; (5,500±200 pc)
Inclination (i): 79°
Period (P): 13.082 d