About: Westerlund 1-20

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http://dbpedia.org/describe/?url=http%3A%2F%2Fdbpedia.org%2Fresource%2FWesterlund_1-20&graph=http%3A%2F%2Fdbpedia.org&graph=http%3A%2F%2Fdbpedia.org

Westerlund 1-20 (abbreviated to Wd 1-20 or just W20) is a red supergiant (RSG) located in the Westerlund 1 super star cluster. Its radius was calculated to be around 965 solar radii (6.72 × 108 km, 4.48 au), making it one of the largest stars discovered so far. This corresponds to a volume 899 million times bigger than the Sun. If placed at the center of the Solar System, the photosphere of Westerlund 1-20 would almost reach the orbit of Jupiter.

Attributes	Values
rdf:type	Thing place dbo:Location schema:Place celestial body star
rdfs:label	Westerlund 1-20 (de) Westerlund 1-20 (en)
rdfs:comment	Westerlund 1-20 ist ein Roter Überriese im Sternbild Altar. Er ist Teil des offenen Sternhaufens Westerlund 1, in dem noch drei weitere rote Überriesen, Westerlund 1-26, Westerlund 1-75 und Westerlund 1-237 bekannt sind. (de) Westerlund 1-20 (abbreviated to Wd 1-20 or just W20) is a red supergiant (RSG) located in the Westerlund 1 super star cluster. Its radius was calculated to be around 965 solar radii (6.72 × 108 km, 4.48 au), making it one of the largest stars discovered so far. This corresponds to a volume 899 million times bigger than the Sun. If placed at the center of the Solar System, the photosphere of Westerlund 1-20 would almost reach the orbit of Jupiter. (en)
foaf:name	Westerlund 1-20 (en)
foaf:depiction
dcterms:subject	M-type supergiants 2MASS objects Ara (constellation)
Wikipage page ID	64101671 (xsd:integer)
Wikipage revision ID	1096486476 (xsd:integer)
Link from a Wikipage to another Wikipage	List of largest stars Infrared Intracluster medium M-type supergiants Photosphere Ara (constellation) Luminosity Solar radius Westerlund 1 Westerlund 1-237 Westerlund 1-26 Westerlund 1-75 2MASS 2MASS objects Ara (constellation) Solar luminosity Astronomical unit Jupiter Kilometre Sun Supergiant star Hertzsprung–Russell diagram Red supergiant Solar System Red supergiant star Stefan–Boltzmann law Super star cluster
sameAs	Westerlund 1-20 Westerlund 1-20 Westerlund 1-20
dbp:wikiPageUsesTemplate	dbt:Stars_of_Ara dbt:Efn dbt:Notelist dbt:Reflist dbt:Short_description dbt:Sky dbt:Starbox_astrometry dbt:Starbox_begin dbt:Starbox_catalog dbt:Starbox_character dbt:Starbox_detail dbt:Starbox_end dbt:Starbox_image dbt:Starbox_observe dbt:Starbox_reference dbt:Val dbt:DEC dbt:Location_mark dbt:RA
thumbnail	wiki-commons:Special:FilePath/Surprise_Cloud_Around_Vast_Star.jpg?width=300
appmag	2.610000 (xsd:double) 4.381000 (xsd:double) 6.378000 (xsd:double)
appmag 2 passband	J (en)
appmag 3 passband	H (en)
appmag 4 passband	K (en)
caption	Westerlund 1 super star cluster. The location of Wd 1-20 is circled. (en)
class	M3 - M6I (en)
constell	Ara (constellation)
epoch	J2000 (en)
equinox	J2000 (en)
p error	0.107300 (xsd:double)
parallax	0.169000 (xsd:double)
prop mo dec	−4.041 (en)
prop mo ra	−2.478 (en)
temperature	3284 (xsd:integer)
type	Red supergiant star
has abstract	Westerlund 1-20 ist ein Roter Überriese im Sternbild Altar. Er ist Teil des offenen Sternhaufens Westerlund 1, in dem noch drei weitere rote Überriesen, Westerlund 1-26, Westerlund 1-75 und Westerlund 1-237 bekannt sind. (de) Westerlund 1-20 (abbreviated to Wd 1-20 or just W20) is a red supergiant (RSG) located in the Westerlund 1 super star cluster. Its radius was calculated to be around 965 solar radii (6.72 × 108 km, 4.48 au), making it one of the largest stars discovered so far. This corresponds to a volume 899 million times bigger than the Sun. If placed at the center of the Solar System, the photosphere of Westerlund 1-20 would almost reach the orbit of Jupiter. The star is classified as a luminous cool supergiant emitting most of its energy in the infrared spectrum. W20 occupies the upper right corner of the Hertzsprung-Russell diagram. Using the effective temperature of 3,500 K, the bolometric luminosity of 126,000 L☉ and the solar effective temperature of 5,772 K, its radius can be calculated using the Stefan-Boltzmann law. Westerlund 1-20 was observed to have an extended, cometary shaped nebula, similar to the other red supergiant Westerlund 1-26. It is therefore likely that its morphology was affected by either the intracluster medium or the cluster wind of Westerlund 1. The nebulae of both Westerlund 1-20 and Westerlund 1-26 are extended outward from the cluster core and most bright at inward direction, indicating the outward cluster wind. (en)
credit	ESO (en)
prov:wasDerivedFrom	wikipedia-en:Westerlund_1-20?oldid=1096486476&ns=0
page length (characters) of wiki page	6061 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Westerlund_1-20
is Link from a Wikipage to another Wikipage of	List of largest known stars Westerlund 1 Westerlund 1-237 Westerlund 1-26 Westerlund 1-75
is foaf:primaryTopic of	wikipedia-en:Westerlund_1-20

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