About: WR 133

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http://dbpedia.org/describe/?url=http%3A%2F%2Fdbpedia.org%2Fresource%2FWR_133

WR 133 is a visually moderately bright Wolf-Rayet star. It is a spectroscopic binary system containing a Wolf-Rayet primary and a class O supergiant secondary. It is in the constellation of Cygnus, lying in the sky at the centre of the triangle formed by β and γ Cygni, near η Cygni. It is the brightest member of the sparse open cluster NGC 6871. WR 133 is listed as a Wolf-Rayet variable star and has been given the variable star designation V1676 Cyg in the General Catalogue of Variable Stars. Its visual magnitude varies between 6.75 and 6.84.

Attributes	Values
rdf:type	Thing place dbo:Location schema:Place celestial body star
rdfs:label	WR 133 (en)
rdfs:comment	WR 133 is a visually moderately bright Wolf-Rayet star. It is a spectroscopic binary system containing a Wolf-Rayet primary and a class O supergiant secondary. It is in the constellation of Cygnus, lying in the sky at the centre of the triangle formed by β and γ Cygni, near η Cygni. It is the brightest member of the sparse open cluster NGC 6871. WR 133 is listed as a Wolf-Rayet variable star and has been given the variable star designation V1676 Cyg in the General Catalogue of Variable Stars. Its visual magnitude varies between 6.75 and 6.84. (en)
foaf:depiction
dcterms:subject	Cygnus (constellation) Durchmusterung objects Henry Draper Catalogue objects Hipparcos objects O-type supergiants Objects with variable star designations Spectroscopic binaries 2MASS objects Wolf–Rayet stars
Wikipage page ID	66589098 (xsd:integer)
Wikipage revision ID	1118282433 (xsd:integer)
Link from a Wikipage to another Wikipage	Durchmusterung Light curve Cygnus (constellation) Durchmusterung objects Henry Draper Catalogue objects Hipparcos objects O-type supergiants Objects with variable star designations Spectroscopic binaries Constellation General Catalogue of Variable Stars Northern Celestial Hemisphere NGC 6871 Henry Draper Catalogue Orbital period Supergiant WR 140 2MASS 2MASS objects Cygnus (constellation) Open cluster Emission line Hipparcos J2000.0 Wolf–Rayet stars Spectroscopic binary Wolf-Rayet star Visual magnitude Variable star Washington Double Star Catalog Γ Cygni Η Cygni Variable star designation Absorption line Beta Cygni
sameAs	WR 133 WR 133
dbp:wikiPageUsesTemplate	dbt:Reflist dbt:Short_description dbt:Smallcaps 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_orbit dbt:Starbox_reference dbt:Val dbt:DEC dbt:RA dbt:Stars_of_Cygnus
thumbnail	wiki-commons:Special:FilePath/V1676CygLightCurve.png?width=300
absmag v	−3.4 / −5.4 (en)
appmag	6.247000 (xsd:double) 6.319000 (xsd:double)
appmag 3 passband	J (en)
appmag 4 passband	K (en)
appmag v	6.750000 (xsd:double)
b-v	+0.13 (en)
class	WN5o + O9I (en)
component	O (en) WR (en)
constell	Cygnus (constellation)
epoch	J2000.0
equinox	J2000.0
p error	0.022300 (xsd:double)
parallax	0.538000 (xsd:double)
period unitless	days (en)
prop mo dec	−6.537 (en)
prop mo ra	−3.175 (en)
u-b	−0.77 (en)
variable	Wolf-Rayet star
has abstract	WR 133 is a visually moderately bright Wolf-Rayet star. It is a spectroscopic binary system containing a Wolf-Rayet primary and a class O supergiant secondary. It is in the constellation of Cygnus, lying in the sky at the centre of the triangle formed by β and γ Cygni, near η Cygni. It is the brightest member of the sparse open cluster NGC 6871. WR 133 is one of the brightest Wolf Rayet (WR) stars in the northern hemisphere, slightly brighter than WR 140 which also in Cygnus. The WR star is typically identified as the primary, being more massive, more luminous, and dominating the spectrum. However, the supergiant secondary is more massive and visually brighter. The primary star is a WN5 nitrogen-rich WR star and the secondary has a spectral type of O9I. The orbit is moderately eccentric and has a period of 113 d, which has been determined from the velocity variations observed with the component's spectral lines, mostly from the HeII emission lines at 541.1 nm for the WR primary, and helium and oxygen absorption lines for the primary. This is the first WN-type WR star to have its mass dynamically determined from orbital motion, although the precision is hampered by the nearly face-on orientation of the orbit. WR 133 is listed as a Wolf-Rayet variable star and has been given the variable star designation V1676 Cyg in the General Catalogue of Variable Stars. Its visual magnitude varies between 6.75 and 6.84. (en)
prov:wasDerivedFrom	wikipedia-en:WR_133?oldid=1118282433&ns=0
page length (characters) of wiki page	9350 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:WR_133

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