Xi Octantis (original) (raw)
Xi Octantis (ξ Octantis förkortat Xi Oct, ξ Oct) som är stjärnans Bayer-beteckning, är en ensam stjärna i stjärnbilden Oktanten (Octans). Den har en genomsnittlig skenbar magnitud av 5,34 och är svagt synlig där ljusföroreningar ej förekommer. Baserat på parallaxmätningar inom Hipparcos-uppdraget på ca 6,6 beräknas den befinna sig på ett avstånd av ca 493 ljusårs (ca 151 parsek) från solen.
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|---|---|
| dbo:abstract | Xi Octantis, Latinized from ξ Octantis, is a solitary variable star in the southern circumpolar constellation Octans. It has an apparent magnitude of about 5.3, allowing it to be faintly seen with the naked eye; however, this varies slightly. Located 514 light years away, the object is receding with a heliocentric radial velocity of 22 km/s. Xi Octantis has a stellar classification of B6 V, indicating that it is an ordinary B-type main-sequence star. Hintler et al. gives it a luminosity class IV (subgiant) while Houk and Cowley gives a classification intermediate between a B5 and B7 dwarf. Nevertheless, it has 4 times the mass of the Sun and is 3 times larger. It shines with a luminosity of 360 L☉ from its photosphere at an effective temperature of 14,050 K, giving it a whitish blue glow. Xi Octantis is 46 million years old – 64.8% through its short main sequence lifetime – and spins modestly with a projected rotational velocity of 30 km/s. When the Hipparcos catalogue was released in 1997, Xi Octantis was found to vary in magnitude — ranging from 5.32 to 5.36 based on data from the International Variable Star Index. It has since been classified as a Slowly pulsating B-dwarf with a period of 1.78 days. (en) Xi Octantis (ξ Octantis förkortat Xi Oct, ξ Oct) som är stjärnans Bayer-beteckning, är en ensam stjärna i stjärnbilden Oktanten (Octans). Den har en genomsnittlig skenbar magnitud av 5,34 och är svagt synlig där ljusföroreningar ej förekommer. Baserat på parallaxmätningar inom Hipparcos-uppdraget på ca 6,6 beräknas den befinna sig på ett avstånd av ca 493 ljusårs (ca 151 parsek) från solen. (sv) Xi Octantis (77 Octantis) é uma estrela na direção da constelação de Octans. Possui uma ascensão reta de 22h 50m 22.75s e uma declinação de −80° 07′ 25.7″. Sua magnitude aparente é igual a 5.32. Considerando sua distância de 444 anos-luz em relação à Terra, sua magnitude absoluta é igual a −0.35. Pertence à classe espectral B6IV. (pt) 南極座ξ，又名CP-80 1055，HD 215573、SAO 258946、HR 8663，是南極座的一颗恒星，视星等为5.35，位于銀經309.03，銀緯-35.53，其B1900.0坐标为赤經22h 41m 3.3s，赤緯-80° -35.53′ 5″。 (zh) |
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| dbp:absmagV | −0.57 (en) |
| dbp:ageMyr | 46 (xsd:integer) |
| dbp:appmagV | 5.320000 (xsd:double) |
| dbp:bV | −0.13 (en) |
| dbp:class | B6 V (en) |
| dbp:constell | dbr:Octans |
| dbp:epoch | J2000.0 (en) |
| dbp:gravity | 4.090000 (xsd:double) |
| dbp:luminosity | 360 (xsd:integer) |
| dbp:mass | 4.020000 (xsd:double) |
| dbp:metalFe | −0.1 (en) |
| dbp:pError | 0.064400 (xsd:double) |
| dbp:parallax | 6.350000 (xsd:double) |
| dbp:propMoDec | −12.607 (en) |
| dbp:propMoRa | +20.003 (en) |
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| dbp:radius | 3 (xsd:integer) |
| dbp:rotationalVelocity | 30 (xsd:integer) |
| dbp:temperature | 14050 (xsd:integer) |
| dbp:type | dbr:Main_sequence |
| dbp:uB | −0.48 (en) |
| dbp:variable | dbr:Slowly_pulsating_B-type_star |
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| rdfs:comment | Xi Octantis (ξ Octantis förkortat Xi Oct, ξ Oct) som är stjärnans Bayer-beteckning, är en ensam stjärna i stjärnbilden Oktanten (Octans). Den har en genomsnittlig skenbar magnitud av 5,34 och är svagt synlig där ljusföroreningar ej förekommer. Baserat på parallaxmätningar inom Hipparcos-uppdraget på ca 6,6 beräknas den befinna sig på ett avstånd av ca 493 ljusårs (ca 151 parsek) från solen. (sv) Xi Octantis (77 Octantis) é uma estrela na direção da constelação de Octans. Possui uma ascensão reta de 22h 50m 22.75s e uma declinação de −80° 07′ 25.7″. Sua magnitude aparente é igual a 5.32. Considerando sua distância de 444 anos-luz em relação à Terra, sua magnitude absoluta é igual a −0.35. Pertence à classe espectral B6IV. (pt) 南極座ξ，又名CP-80 1055，HD 215573、SAO 258946、HR 8663，是南極座的一颗恒星，视星等为5.35，位于銀經309.03，銀緯-35.53，其B1900.0坐标为赤經22h 41m 3.3s，赤緯-80° -35.53′ 5″。 (zh) Xi Octantis, Latinized from ξ Octantis, is a solitary variable star in the southern circumpolar constellation Octans. It has an apparent magnitude of about 5.3, allowing it to be faintly seen with the naked eye; however, this varies slightly. Located 514 light years away, the object is receding with a heliocentric radial velocity of 22 km/s. (en) |
| rdfs:label | Xi Octantis (pt) Xi Octantis (en) Xi Octantis (sv) 南極座ξ (zh) |
| owl:sameAs | wikidata:Xi Octantis dbpedia-pt:Xi Octantis dbpedia-sv:Xi Octantis dbpedia-zh:Xi Octantis https://global.dbpedia.org/id/7tHe |
| prov:wasDerivedFrom | wikipedia-en:Xi_Octantis?oldid=1114656852&ns=0 |
| foaf:depiction | wiki-commons:Special:FilePath/Red_circle.svg wiki-commons:Special:FilePath/Octans_IAU.svg wiki-commons:Special:FilePath/XiOctLightCurve.png |
| foaf:isPrimaryTopicOf | wikipedia-en:Xi_Octantis |
| foaf:name | ξ Octantis (en) |
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| is foaf:primaryTopic of | wikipedia-en:Xi_Octantis |
