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- Eta_Aquilae abstract "Eta Aquilae (η Aql, η Aquilae) is the Bayer designation for a star in the equatorial constellation of Aquila, the eagle. It was once part of the former constellation Antinous. On average, this star has an apparent visual magnitude of 3.87, making it one of the brighter members of Aquila. Based upon parallax measurements made during the Hipparcos mission, this star is located at a distance of roughly 1,382 light-years (424 parsecs), although the parallax estimate has a 44% margin of error.This is a Cepheid variable star, with an apparent magnitude that ranges from 3.5 to 4.4 over a period of 7.176641 days. Along with Delta Cephei, Zeta Geminorum and Beta Doradus, it is one of the most prominent naked eye Cepheids; that is, both the star itself and the variation in its brightness can be distinguished with the naked eye. Some other Cepheids such as Polaris are bright but have only a very small variation in brightness.At the relatively young age of 26 million years, this massive star has burned through the hydrogen fuel at its core and evolved into a supergiant, giving it a baseline stellar classification of F6 Ibv. The Ib luminosity class indicates this is a less luminous type of supergiant, while the 'v' suffix shows that the spectrum of the star varies. The periodic pulsations of this star actually cause the stellar class to vary between (F6.5–G2)Ib over the course of each cycle.Compared to the Sun, Eta Aquilae has around 9 times the mass, roughly 66 times the radius, and is radiating 11,474 times as much luminosity. This energy is being emitted from the outer envelope at an effective temperature of 6,000 K, giving it the yellow-white hued glow of an F-type star. The radius of the star varies by 4.59 × 106 km (0.007 R☉) over the course of a pulsation cycle. Compared to its neighbors, this star has a high peculiar velocity of 16.7 ± 6.9 km s−1.Variability of this star was discovered by Edward Pigott in 1784.".
- Eta_Aquilae thumbnail Aquila_IAU.svg?width=300.
- Eta_Aquilae wikiPageExternalLink sim-id.pl?protocol=html&Ident=eta+aquilae.
- Eta_Aquilae wikiPageExternalLink AladinPreview?-c=19+52+28.3679%2B01+00+20.378&ident=V*+eta+Aql&submit=Aladin+previewer.
- Eta_Aquilae wikiPageExternalLink etaaql.html.
- Eta_Aquilae wikiPageID "2398362".
- Eta_Aquilae wikiPageLength "12641".
- Eta_Aquilae wikiPageOutDegree "55".
- Eta_Aquilae wikiPageRevisionID "680518254".
- Eta_Aquilae wikiPageWikiLink 58_Aquilae.
- Eta_Aquilae wikiPageWikiLink 62_Aquilae.
- Eta_Aquilae wikiPageWikiLink Antinous_(constellation).
- Eta_Aquilae wikiPageWikiLink Apparent_magnitude.
- Eta_Aquilae wikiPageWikiLink Apparent_visual_magnitude.
- Eta_Aquilae wikiPageWikiLink Aquila_(constellation).
- Eta_Aquilae wikiPageWikiLink Bayer_designation.
- Eta_Aquilae wikiPageWikiLink Beta_Doradus.
- Eta_Aquilae wikiPageWikiLink Bonner_Durchmusterung.
- Eta_Aquilae wikiPageWikiLink Bright_Star_Catalogue.
- Eta_Aquilae wikiPageWikiLink Catalogues_of_Fundamental_Stars.
- Eta_Aquilae wikiPageWikiLink Category:Aquila_(constellation).
- Eta_Aquilae wikiPageWikiLink Category:Bayer_objects.
- Eta_Aquilae wikiPageWikiLink Category:Cepheid_variables.
- Eta_Aquilae wikiPageWikiLink Category:F-type_supergiants.
- Eta_Aquilae wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
- Eta_Aquilae wikiPageWikiLink Category:Stars_with_proper_names.
- Eta_Aquilae wikiPageWikiLink Celestial_equator.
- Eta_Aquilae wikiPageWikiLink Cepheid_variable.
- Eta_Aquilae wikiPageWikiLink Chinese_language.
- Eta_Aquilae wikiPageWikiLink Classical_Cepheid_variable.
- Eta_Aquilae wikiPageWikiLink Classical_Cepheids.
- Eta_Aquilae wikiPageWikiLink Constellation.
- Eta_Aquilae wikiPageWikiLink Delta_Aquilae.
- Eta_Aquilae wikiPageWikiLink Delta_Cephei.
- Eta_Aquilae wikiPageWikiLink Durchmusterung.
- Eta_Aquilae wikiPageWikiLink Edward_Pigott.
- Eta_Aquilae wikiPageWikiLink Effective_temperature.
- Eta_Aquilae wikiPageWikiLink F-type_star.
- Eta_Aquilae wikiPageWikiLink Fifth_Fundamental_Catalogue.
- Eta_Aquilae wikiPageWikiLink Harvard_Revised_catalogue.
- Eta_Aquilae wikiPageWikiLink Hebrew.
- Eta_Aquilae wikiPageWikiLink Hebrew_language.
- Eta_Aquilae wikiPageWikiLink Henry_Draper_Catalogue.
- Eta_Aquilae wikiPageWikiLink Hipparcos.
- Eta_Aquilae wikiPageWikiLink Hipparcos_catalogue.
- Eta_Aquilae wikiPageWikiLink Hydrogen_burning.
- Eta_Aquilae wikiPageWikiLink List_of_stars_in_Aquila.
- Eta_Aquilae wikiPageWikiLink Luminosity_class.
- Eta_Aquilae wikiPageWikiLink Margin_of_error.
- Eta_Aquilae wikiPageWikiLink Naked_eye.
- Eta_Aquilae wikiPageWikiLink Ox_(Chinese_constellation).
- Eta_Aquilae wikiPageWikiLink Parallax.
- Eta_Aquilae wikiPageWikiLink Peculiar_velocity.
- Eta_Aquilae wikiPageWikiLink Polaris.
- Eta_Aquilae wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
- Eta_Aquilae wikiPageWikiLink Smithsonian_Astrophysical_Observatory_catalogue.
- Eta_Aquilae wikiPageWikiLink Spectrum.
- Eta_Aquilae wikiPageWikiLink Star.
- Eta_Aquilae wikiPageWikiLink Stellar_atmosphere.
- Eta_Aquilae wikiPageWikiLink Stellar_classification.
- Eta_Aquilae wikiPageWikiLink Stellar_evolution.
- Eta_Aquilae wikiPageWikiLink Stellar_nucleosynthesis.
- Eta_Aquilae wikiPageWikiLink Supergiant.
- Eta_Aquilae wikiPageWikiLink Supergiant_star.
- Eta_Aquilae wikiPageWikiLink Theta_Aquilae.
- Eta_Aquilae wikiPageWikiLink Zeta_Geminorum.
- Eta_Aquilae wikiPageWikiLink File:Aquila_IAU.svg.
- Eta_Aquilae wikiPageWikiLink File:Cercle_rouge_100%25.svg.
- Eta_Aquilae wikiPageWikiLinkText "Eta Aquilae".
- Eta_Aquilae wikiPageWikiLinkText "eta Aquilae".
- Eta_Aquilae wikiPageWikiLinkText "η Aql ".
- Eta_Aquilae wikiPageWikiLinkText "η Aql".
- Eta_Aquilae wikiPageWikiLinkText "η Aquilae".
- Eta_Aquilae ageMyr "26.4".
- Eta_Aquilae appmagV "3.87".
- Eta_Aquilae bV "+0.89".
- Eta_Aquilae class "F6 Ibv".
- Eta_Aquilae constell Aquila_(constellation).
- Eta_Aquilae epoch "J2000".
- Eta_Aquilae gravity "1.5".
- Eta_Aquilae hasPhotoCollection Eta_Aquilae.
- Eta_Aquilae luminosity "11474".
- Eta_Aquilae mass "9.3".
- Eta_Aquilae metalFe "+0.10".
- Eta_Aquilae pError "1.04".
- Eta_Aquilae parallax "2.36".
- Eta_Aquilae propMoDec "–8.21".
- Eta_Aquilae propMoRa "+6.91".
- Eta_Aquilae rI "+0.47".
- Eta_Aquilae radialV "–14.8".
- Eta_Aquilae radius "66".
- Eta_Aquilae simbad "HD+187929".
- Eta_Aquilae temperature "6000".
- Eta_Aquilae uB "+0.51".
- Eta_Aquilae variable Cepheid_variable.
- Eta_Aquilae wikiPageUsesTemplate Template:Cite_web.
- Eta_Aquilae wikiPageUsesTemplate Template:Convert.
- Eta_Aquilae wikiPageUsesTemplate Template:Lang-en.
- Eta_Aquilae wikiPageUsesTemplate Template:Reflist.
- Eta_Aquilae wikiPageUsesTemplate Template:Sky.