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Cygnus X-1

Cygnus X-1 (abbreviated Cyg X-1) is a galactic X-ray source in the constellation Cygnus and was the first such source widely accepted to be a black hole. It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources detectable from Earth, producing a peak X-ray flux density of 2.3×10−23 W/(m2⋅Hz) (2.3×103 jansky). It remains…

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Apparent magnitude (V)
8.72 - 8.93
B−V color index
+0.81
Constellation
Cygnus
Declination
+35° 12′ 05.7845″
Right ascension
19h 58m 21.67574s
Spectral type
O9.7Iab

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Overview

Discovery and observation

Binary system

Stephen Hawking and Kip Thorne

In popular culture

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Map overview Semantic statistics

Cygnus X-1

Nodes153
Edges152
Triples68
Avg. degree1.99
Density0.013072
Components1

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Cygnus X-1

Top relations

related to External links · 37
Cygnus X-1 → April, Archived, Articles, Artist's, Astronomical Observatory, Astronomy Picture, Astrophoto, Black Hole, Bonnell, Constellation GuideNuSTAR, Cygnus, Cygnus X-1, Cyrmon, Day, December, DSS2, ESA, First View, GALEX, High-Energy X-ray Universe NASA/JPL-Caltech
related to In popular culture · 17
Cygnus X-1 → As, Book, Book II, Canadian, Cygnus, Disney, Dr, Farewell, Hans Reinhardt, Hemispheres, In, Kings, Rocinante, Rush, The, The Black Hole, The Voyage
Apparent magnitude (V) · 1
Cygnus X-1 → 8.72 - 8.93
B−V color index · 1
Cygnus X-1 → +0.81
Constellation · 1
Cygnus X-1 → Cygnus
Declination · 1
Cygnus X-1 → +35° 12′ 05.7845″
Right ascension · 1
Cygnus X-1 → 19h 58m 21.67574s
Spectral type · 1
Cygnus X-1 → O9.7Iab
U−B color index · 1
Cygnus X-1 → −0.30
Variable type · 1
Cygnus X-1 → Ellipsoidal variable

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Important terminology

cygnus x-1 black x-ray hole star hde 226868 may disk mass object stellar compact system estimated x-rays accretion wind matter

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Cygnus X-1Apparent magnitude (V)8.72 - 8.931.00infobox
Cygnus X-1B−V color index+0.811.00infobox
Cygnus X-1ConstellationCygnus1.00infobox
Cygnus X-1Declination+35° 12′ 05.7845″1.00infobox
Cygnus X-1Right ascension19h 58m 21.67574s1.00infobox
Cygnus X-1Spectral typeO9.7Iab1.00infobox
Cygnus X-1U−B color index−0.301.00infobox
Cygnus X-1Variable typeEllipsoidal variable1.00infobox
Cygnus X-1is ahigh-mass X-ray binary system located about 70.90text
HDE 226868/Cygnus X-1instance ofThe similarities between the emissions of X-ray binaries0.80text
active galactic nuclei suggests a common mechanism of energy generation involving a black holeinstance ofThe similarities between the emissions of X-ray binaries0.80text
an orbiting accretion diskinstance ofThe similarities between the emissions of X-ray binaries0.80text

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