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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.".
- Eta_Aquilae thumbnail Aquila_IAU.svg?width=300.
- Eta_Aquilae wikiPageExternalLink AladinPreview?-c=19+52+28.3679%2B01+00+20.378&ident=V*+eta+Aql&submit=Aladin+previewer.
- Eta_Aquilae wikiPageExternalLink sim-id.pl?protocol=html&Ident=eta+aquilae.
- Eta_Aquilae wikiPageExternalLink etaaql.html.
- Eta_Aquilae wikiPageID "2398362".
- Eta_Aquilae wikiPageRevisionID "601978053".
- 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 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 simbad "HD+187929".
- Eta_Aquilae temperature "6000".
- Eta_Aquilae uB "+0.51".
- Eta_Aquilae variable Cepheid_variable.
- Eta_Aquilae subject Category:Aquila_(constellation).
- Eta_Aquilae subject Category:Bayer_objects.
- Eta_Aquilae subject Category:Cepheid_variables.
- Eta_Aquilae subject Category:F-type_supergiants.
- Eta_Aquilae subject Category:Henry_Draper_Catalogue_objects.
- Eta_Aquilae subject Category:Stars_with_proper_names.
- Eta_Aquilae type BayerObjects.
- Eta_Aquilae type CelestialBody109239740.
- Eta_Aquilae type CepheidVariables.
- Eta_Aquilae type F-typeSupergiants.
- Eta_Aquilae type HenryDraperCatalogueObjects.
- Eta_Aquilae type NaturalObject100019128.
- Eta_Aquilae type Object100002684.
- Eta_Aquilae type PhysicalEntity100001930.
- Eta_Aquilae type Star109444100.
- Eta_Aquilae type StarsWithProperNames.
- Eta_Aquilae type Supergiant109450708.
- Eta_Aquilae type Thing100002452.
- Eta_Aquilae type Variable109468959.
- Eta_Aquilae type Whole100003553.
- Eta_Aquilae type CelestialBody.
- Eta_Aquilae type Star.
- Eta_Aquilae type PhysicalBody.
- Eta_Aquilae comment "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.".
- Eta_Aquilae label "Eta Aquilae".
- Eta_Aquilae label "Eta Aquilae".
- Eta_Aquilae label "Eta Aquilae".
- Eta_Aquilae label "Eta Aquilae".
- Eta_Aquilae label "Eta Aquilae".
- Eta_Aquilae label "Eta Aquilae".
- Eta_Aquilae label "Эта Орла".
- Eta_Aquilae label "わし座イータ星".
- Eta_Aquilae label "天桴四".
- Eta_Aquilae sameAs Eta_Aquilae.
- Eta_Aquilae sameAs Eta_Aquilae.
- Eta_Aquilae sameAs Eta_Aquilae.
- Eta_Aquilae sameAs Eta_Aquilae.
- Eta_Aquilae sameAs Eta_Aquilae.
- Eta_Aquilae sameAs わし座イータ星.
- Eta_Aquilae sameAs 독수리자리_에타.
- Eta_Aquilae sameAs Eta_Aquilae.
- Eta_Aquilae sameAs m.07994y.
- Eta_Aquilae sameAs Q1141708.
- Eta_Aquilae sameAs Q1141708.
- Eta_Aquilae sameAs Eta_Aquilae.
- Eta_Aquilae wasDerivedFrom Eta_Aquilae?oldid=601978053.
- Eta_Aquilae depiction Aquila_IAU.svg.
- Eta_Aquilae isPrimaryTopicOf Eta_Aquilae.
- Eta_Aquilae name "Eta Aquilae".