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- V404_Cygni abstract "V404 Cygni is a binary star system consisting of a black hole with a mass of about 12±3 solar masses and a late G or early K companion star of mass slightly smaller than the Sun in the constellation of Cygnus. The two stars orbit each other every 6.5 d at fairly close range. Due to their close proximity the main sequence star would be distorted into egg shape by the black hole's gravity and lose mass to the black hole.The "V" in the name indicates that it is a variable star, which repeatedly gets brighter and fainter over time. It is also considered a nova, because at least three times in the 20th century it produced a bright outburst of energy. Finally, it is a soft X-ray transient because it periodically emits short bursts of X-rays.It has been suggested that the more massive component of the system might be a Q star instead of a black hole.In 2009, the black hole in the V404 Cygni system became the first black hole to have an accurate parallax measurement for its distance from our solar system; the distance is 2.39±0.14 kiloparsecs, or (7.80±0.46)×103 light-years.".
- V404_Cygni wikiPageID "29298391".
- V404_Cygni wikiPageRevisionID "601565687".
- V404_Cygni hasPhotoCollection V404_Cygni.
- V404_Cygni subject Category:Cygnus_(constellation).
- V404_Cygni subject Category:K-type_subgiants.
- V404_Cygni subject Category:Objects_named_with_variable_star_designations.
- V404_Cygni subject Category:Objects_within_10_kly_of_Earth.
- V404_Cygni subject Category:Stellar_black_holes.
- V404_Cygni subject Category:X-ray_binaries.
- V404_Cygni comment "V404 Cygni is a binary star system consisting of a black hole with a mass of about 12±3 solar masses and a late G or early K companion star of mass slightly smaller than the Sun in the constellation of Cygnus. The two stars orbit each other every 6.5 d at fairly close range.".
- V404_Cygni label "V404 Cygni".
- V404_Cygni label "V404 Cygni".
- V404_Cygni label "V404 Cygni".
- V404_Cygni label "V404 Cygni".
- V404_Cygni label "V404 Cygni".
- V404_Cygni label "V404 Cygni".
- V404_Cygni label "V404 Cygni".
- V404_Cygni label "في 404 الدجاجة".
- V404_Cygni sameAs V404_Cygni.
- V404_Cygni sameAs V404_Cygni.
- V404_Cygni sameAs V404_Cygni.
- V404_Cygni sameAs V404_Cygni.
- V404_Cygni sameAs V404_Cygni.
- V404_Cygni sameAs V404_Cygni.
- V404_Cygni sameAs m.0ds9kzb.
- V404_Cygni sameAs Q1635586.
- V404_Cygni sameAs Q1635586.
- V404_Cygni wasDerivedFrom V404_Cygni?oldid=601565687.
- V404_Cygni isPrimaryTopicOf V404_Cygni.