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gptkbp:instance_of
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gptkb:star
|
|
gptkbp:associated_with
|
gptkb:Cygnus_constellation
|
|
gptkbp:contains_star
|
yes
|
|
gptkbp:discovered_by
|
gptkb:NASA
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gptkbp:distance_from_earth
|
approximately 7,000 light years
|
|
gptkbp:first_appearance
|
gptkb:1967
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|
gptkbp:has_spectral_type
|
O-type star for the companion
|
|
gptkbp:has_variations
|
yes
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|
https://www.w3.org/2000/01/rdf-schema#label
|
Cygnus X-20
|
|
gptkbp:is_located_at
|
Declination +35° 42' 30''
Right Ascension 19h 58m 21.0s
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|
gptkbp:is_observed_in
|
gptkb:Chandra_X-ray_Observatory
|
|
gptkbp:is_part_of
|
gptkb:the_Milky_Way_galaxy
|
|
gptkbp:is_studied_in
|
multiple space telescopes
|
|
gptkbp:lighting
|
yes
varies significantly
|
|
gptkbp:located_in
|
constellation Cygnus
|
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gptkbp:mass
|
greater than 10 solar masses
|
|
gptkbp:notable_for
|
being one of the first X-ray binaries discovered.
|
|
gptkbp:orbital_period
|
approximately 5.6 days
|
|
gptkbp:primary_star_type
|
gptkb:supermassive_black_hole
|
|
gptkbp:secondary_star_type
|
gptkb:main-sequence_star
|
|
gptkbp:type
|
gptkb:supermassive_black_hole
|
|
gptkbp:bfsParent
|
gptkb:Cygnus
|
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gptkbp:bfsLayer
|
5
|