V404 Cygni
Star system
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V404 Cygni is a microquasar and a binary system in the constellation of Cygnus. It contains a black hole with a mass of about 9 M☉ and an early K giant star companion with a mass slightly smaller than the Sun. The star and the black hole orbit... Wikipedia
Distance to Earth: 7,795 light years
Declination: +33° 52′ 02.0″
Radius: 6.0 R☉
Apparent magnitude (V): 12.7
Absolute magnitude (MV): +3.4
B−V color index: +1.5
Constellation: Cygnus