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- Epsilon_Aquilae abstract "Epsilon Aquilae (ε Aql, ε Aquilae) is the Bayer designation for a binary star in the equatorial constellation of Aquila. It has an apparent visual magnitude of 4.02 and is visible to the naked eye. Based upon an annual parallax of 21.05 mas, Epsilon Aquilae lies at a distance of approximately 155 light-years (48 parsecs) from Earth. This is a spectroscopic binary system. The pair orbit each other over a period of 1,271 days (3.5 years) with an eccentricity of 0.27.It has the traditional name Deneb el Okab, from an Arabic term ذنب العقاب ðanab al-cuqāb meaning "the tail of the eagle", and the Mandarin names Woo and Yuë, derived from and represent the state Wu (吳), an old state was located at the mouth of the Yangtze River, and Yue (越), an old state in Zhejiang province (together with 19 Capricorni in Twelve States asterism). According to the R.H. Allen's works, it shares names with ζ Aquilae. Epsilon Aquilae is more precisely called Deneb el Okab Borealis, because is situated to the north of Zeta Aquilae, which can therefore be called Deneb el Okab Australis. The primary component of this system is an evolved giant star with a stellar classification of K1 III. It has more than double the mass of the Sun and has expanded to ten times the Sun's radius. It shines with 54–fold the Sun's luminosity, which is being radiated from its outer envelope at an effective temperature of 4,760 K. At this heat, it glows with the orange-hue of a K-type star. This has been designated a barium star, meaning its atmosphere is extremely enriched with barium and other heavy elements. However, this is disputed, with astronomer Andrew McWilliam (1990) finding normal abundances from an s-process.".
- Epsilon_Aquilae thumbnail Aquila_IAU.svg?width=300.
- Epsilon_Aquilae wikiPageExternalLink AladinPreview?-c=*+eps+Aql&ident=*+eps+Aql&submit=Aladin+previewer.
- Epsilon_Aquilae wikiPageExternalLink denebokabb.html.
- Epsilon_Aquilae wikiPageID "2866094".
- Epsilon_Aquilae wikiPageRevisionID "601977490".
- Epsilon_Aquilae absmagBol "+0.30".
- Epsilon_Aquilae appmagV "4.02".
- Epsilon_Aquilae bV "+1.08".
- Epsilon_Aquilae class "K1 III".
- Epsilon_Aquilae component "ε Aql A".
- Epsilon_Aquilae component "ε Aql B".
- Epsilon_Aquilae constell Aquila_(constellation).
- Epsilon_Aquilae epoch "J2000".
- Epsilon_Aquilae gravity "2.91".
- Epsilon_Aquilae hasPhotoCollection Epsilon_Aquilae.
- Epsilon_Aquilae mass "2.1".
- Epsilon_Aquilae metalFe "0".
- Epsilon_Aquilae pError "0.7".
- Epsilon_Aquilae parallax "21.05".
- Epsilon_Aquilae propMoDec "–72.36".
- Epsilon_Aquilae propMoRa "–50.75".
- Epsilon_Aquilae rI "0.52".
- Epsilon_Aquilae radialV "–48".
- Epsilon_Aquilae rotationalVelocity "4.4".
- Epsilon_Aquilae temperature "4760".
- Epsilon_Aquilae uB "+1.04".
- Epsilon_Aquilae subject Category:Aquila_(constellation).
- Epsilon_Aquilae subject Category:Bayer_objects.
- Epsilon_Aquilae subject Category:Binary_stars.
- Epsilon_Aquilae subject Category:Henry_Draper_Catalogue_objects.
- Epsilon_Aquilae subject Category:K-type_giants.
- Epsilon_Aquilae subject Category:Spectroscopic_binaries.
- Epsilon_Aquilae subject Category:Stars_with_proper_names.
- Epsilon_Aquilae type Animal100015388.
- Epsilon_Aquilae type BayerObjects.
- Epsilon_Aquilae type BinaryStar109221070.
- Epsilon_Aquilae type BinaryStars.
- Epsilon_Aquilae type CelestialBody109239740.
- Epsilon_Aquilae type Giant101323781.
- Epsilon_Aquilae type HenryDraperCatalogueObjects.
- Epsilon_Aquilae type K-typeGiants.
- Epsilon_Aquilae type LivingThing100004258.
- Epsilon_Aquilae type NaturalObject100019128.
- Epsilon_Aquilae type Object100002684.
- Epsilon_Aquilae type Organism100004475.
- Epsilon_Aquilae type PhysicalEntity100001930.
- Epsilon_Aquilae type SpectroscopicBinaries.
- Epsilon_Aquilae type Star109444100.
- Epsilon_Aquilae type StarsWithProperNames.
- Epsilon_Aquilae type Whole100003553.
- Epsilon_Aquilae type CelestialBody.
- Epsilon_Aquilae type Star.
- Epsilon_Aquilae type PhysicalBody.
- Epsilon_Aquilae comment "Epsilon Aquilae (ε Aql, ε Aquilae) is the Bayer designation for a binary star in the equatorial constellation of Aquila. It has an apparent visual magnitude of 4.02 and is visible to the naked eye. Based upon an annual parallax of 21.05 mas, Epsilon Aquilae lies at a distance of approximately 155 light-years (48 parsecs) from Earth. This is a spectroscopic binary system.".
- Epsilon_Aquilae label "Deneb el Okab Borealis".
- Epsilon_Aquilae label "Epsilon Aquilae".
- Epsilon_Aquilae label "Epsilon Aquilae".
- Epsilon_Aquilae label "Epsilon Aquilae".
- Epsilon_Aquilae label "Epsilon Aquilae".
- Epsilon_Aquilae label "Epsilon Aquilae".
- Epsilon_Aquilae label "Épsilon Aquilae".
- Epsilon_Aquilae label "わし座イプシロン星".
- Epsilon_Aquilae label "吴越增一".
- Epsilon_Aquilae sameAs Deneb_el_Okab_Borealis.
- Epsilon_Aquilae sameAs Épsilon_Aquilae.
- Epsilon_Aquilae sameAs Epsilon_Aquilae.
- Epsilon_Aquilae sameAs Epsilon_Aquilae.
- Epsilon_Aquilae sameAs Epsilon_Aquilae.
- Epsilon_Aquilae sameAs わし座イプシロン星.
- Epsilon_Aquilae sameAs Epsilon_Aquilae.
- Epsilon_Aquilae sameAs Epsilon_Aquilae.
- Epsilon_Aquilae sameAs m.087s4p.
- Epsilon_Aquilae sameAs Q684292.
- Epsilon_Aquilae sameAs Q684292.
- Epsilon_Aquilae sameAs Epsilon_Aquilae.
- Epsilon_Aquilae wasDerivedFrom Epsilon_Aquilae?oldid=601977490.
- Epsilon_Aquilae depiction Aquila_IAU.svg.
- Epsilon_Aquilae isPrimaryTopicOf Epsilon_Aquilae.
- Epsilon_Aquilae name "Epsilon Aquilae".