About: 47 Cygni

An Entity of Type: star, from Named Graph: http://dbpedia.org, within Data Space: dbpedia.org

47 Cygni is a triple star system in the northern constellation of Cygnus, and is located around 4,000 light years from the Earth. It is visible to the naked eye with a combined apparent visual magnitude of 4.61. The system is moving closer to the Earth with a heliocentric radial velocity of −4.6 km/s. The supergiant primary is a slow irregular variable with an amplitude of about 0.1 magnitudes. Its close companion has 57% of the mass of the Sun. The secondary is a hot B-type main-sequence star, but still 2.5 magnitudes fainter than the primary.

Property Value
dbo:abstract
  • 47 Cygni is a triple star system in the northern constellation of Cygnus, and is located around 4,000 light years from the Earth. It is visible to the naked eye with a combined apparent visual magnitude of 4.61. The system is moving closer to the Earth with a heliocentric radial velocity of −4.6 km/s. The dual nature of this system was recognized by Annie Cannon in 1912, and she assigned the pair separate Henry Draper Catalogue identifiers. They orbit each other with a period of around 143.69 yr. The primary component is itself a spectroscopic binary in a near circular orbit with a period of around 3.06 yr. The a sin i value for the primary is 30.8 ± 1.6 Gm (0.206 ± 0.011 AU), where a is the semimajor axis and i is the orbital inclination. It has been repeatedly resolved by speckle interferometery since 1973. Radio emission was detected from this system in 1985/86. The supergiant primary is a slow irregular variable with an amplitude of about 0.1 magnitudes. Its close companion has 57% of the mass of the Sun. The secondary is a hot B-type main-sequence star, but still 2.5 magnitudes fainter than the primary. (en)
  • 47 Cygni, som är stjärnans Flamsteed-beteckning, är en trippelstjärna belägen i den södra delen av stjärnbilden Svanen, som också har variabelbeteckningen V2125 Cygni. Den har en kombinerad skenbar magnitud på ca 4,61 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 0,76 mas, beräknas den befinna sig på ett avstånd på ca 4 000 ljusår (ca 1 300 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca -4,6 km/s. (sv)
  • 天鵝座47,又名BD+34 4079,HD 196093、SAO 70203、HR 7866,是天鵝座的一颗恒星,视星等为4.61,位于銀經75.43,銀緯-2.93,其B1900.0坐标为赤經20h 30m 0.7s,赤緯+34° -2.93′ 30″。 (zh)
dbo:thumbnail
dbo:wikiPageID
  • 36847345 (xsd:integer)
dbo:wikiPageLength
  • 9186 (xsd:nonNegativeInteger)
dbo:wikiPageRevisionID
  • 1124281269 (xsd:integer)
dbo:wikiPageWikiLink
dbp:absmagV
  • (en)
  • −4.1 (en)
dbp:appmagV
  • 4.610000 (xsd:double)
  • (en)
dbp:class
  • (en)
  • K6: Ib + B2.5: (en)
dbp:component
  • 47 (xsd:integer)
dbp:constell
dbp:eccentricity
  • 0 (xsd:integer)
dbp:epoch
  • J2000 (en)
dbp:gravity
  • 1.230000 (xsd:double)
dbp:mass
  • 0.570000 (xsd:double)
  • 10.960000 (xsd:double)
dbp:metalFe
  • 0.130000 (xsd:double)
dbp:noHeading
  • y (en)
dbp:pError
  • 0.228500 (xsd:double)
dbp:parallax
  • 0.760500 (xsd:double)
dbp:propMoDec
  • −3.408 (en)
dbp:propMoRa
  • −3.746 (en)
dbp:radius
  • 575 (xsd:integer)
dbp:temperature
  • 4217 (xsd:integer)
dbp:variable
dbp:wikiPageUsesTemplate
dcterms:subject
gold:hypernym
rdf:type
rdfs:comment
  • 47 Cygni, som är stjärnans Flamsteed-beteckning, är en trippelstjärna belägen i den södra delen av stjärnbilden Svanen, som också har variabelbeteckningen V2125 Cygni. Den har en kombinerad skenbar magnitud på ca 4,61 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 0,76 mas, beräknas den befinna sig på ett avstånd på ca 4 000 ljusår (ca 1 300 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca -4,6 km/s. (sv)
  • 天鵝座47,又名BD+34 4079,HD 196093、SAO 70203、HR 7866,是天鵝座的一颗恒星,视星等为4.61,位于銀經75.43,銀緯-2.93,其B1900.0坐标为赤經20h 30m 0.7s,赤緯+34° -2.93′ 30″。 (zh)
  • 47 Cygni is a triple star system in the northern constellation of Cygnus, and is located around 4,000 light years from the Earth. It is visible to the naked eye with a combined apparent visual magnitude of 4.61. The system is moving closer to the Earth with a heliocentric radial velocity of −4.6 km/s. The supergiant primary is a slow irregular variable with an amplitude of about 0.1 magnitudes. Its close companion has 57% of the mass of the Sun. The secondary is a hot B-type main-sequence star, but still 2.5 magnitudes fainter than the primary. (en)
rdfs:label
  • 47 Cygni (en)
  • 47 Cygni (sv)
  • 天津增十三 (zh)
owl:sameAs
prov:wasDerivedFrom
foaf:depiction
foaf:isPrimaryTopicOf
foaf:name
  • 47 Cygni (en)
is dbo:wikiPageRedirects of
is dbo:wikiPageWikiLink of
is foaf:primaryTopic of
Powered by OpenLink Virtuoso    This material is Open Knowledge     W3C Semantic Web Technology     This material is Open Knowledge    Valid XHTML + RDFa
This content was extracted from Wikipedia and is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License