Zeta Aquilae (ζ Aql, ζ Aquilae) is a triple star system in the constellation

Constellation

In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....

 Aquila

Aquila (constellation)

Aquila is a stellar constellation. Its name is Latin for 'eagle' and it is commonly represented as such. In mythology, Aquila was owned by the Roman god Jupiter and performed many tasks for him....

. It has the traditional names Deneb el Okab, from an Arabic

Arabic language

Arabic is a name applied to the descendants of the Classical Arabic language of the 6th century AD, used most prominently in the Quran, the Islamic Holy Book...

 term ذنب العقاب ðanab al-^cuqāb meaning "the tail of the falcon", and the Mandarin

Standard Mandarin

Standard Chinese or Modern Standard Chinese, also known as Mandarin or Putonghua, is the official language of the People's Republic of China and Republic of China , and is one of the four official languages of Singapore....

 names Woo and Yuë, derived from and represent the state Wu

Wu (state)

The State of Wu , also known as Gou Wu or Gong Wu , was one of the vassal states during the Western Zhou Dynasty and the Spring and Autumn Period. The State of Wu was located at the mouth of the Yangtze River east of the State of Chu. Considered a semi-barbarian state by ancient Chinese...

(吳), an old state was located at the mouth of the Yangtze River

Yangtze River

The Yangtze, Yangzi or Cháng Jiāng is the longest river in Asia, and the third-longest in the world. It flows for from the glaciers on the Tibetan Plateau in Qinghai eastward across southwest, central and eastern China before emptying into the East China Sea at Shanghai. It is also one of the...

, and Yue

Yue (state)

Yue was a state in China which existed during the Spring and Autumn Period and the Warring States Period , in the modern province of Zhejiang. During the Spring and Autumn Period, its capital was in Guiji , near the modern city of Shaoxing...

(越), an old state in Zhejiang

Zhejiang

Zhejiang is an eastern coastal province of the People's Republic of China. The word Zhejiang was the old name of the Qiantang River, which passes through Hangzhou, the provincial capital...

 province (together with 19 Capricorni or ψ Capricorni

Psi Capricorni

Psi Capricorni is a star in the constellation Capricornus. ψ Capricorni is a yellow-white F-type main sequence dwarf with an apparent magnitude of +4.13. It is approximately 47.9 light years from Earth...

 in R.H.Allen's version, in Twelve States

Girl (Chinese constellation)

The Girl mansion is one of the Twenty-eight mansions of the Chinese constellations. It is one of the northern mansions of the Black Tortoise.- Asterisms :...

asterism). According to the R.H. Allen's works, it shares names with ε Aquilae.

In Chinese

Chinese language

The Chinese language is a language or language family consisting of varieties which are mutually intelligible to varying degrees. Originally the indigenous languages spoken by the Han Chinese in China, it forms one of the branches of Sino-Tibetan family of languages...

, , meaning Left Wall of Heavenly Market Enclosure

Heavenly Market enclosure

Tian Shi Yuan, the Heavenly Market Enclosure , is one of the San Yuan or Three enclosures. Stars and constellations of this group are visible during late summer and early autumn in the Northern Hemisphere . The summer triangle lies directly to the northwest.-Asterisms:The asterisms are :...

, refers to an asterism which is represent eleven old states in China which is marking the left borderline of the enclosure, consisting of ζ Aquilae, δ Herculis

Delta Herculis

Delta Herculis is a fourth-magnitude star in the constellation Hercules. It has the traditional name Sarin....

, λ Herculis

Lambda Herculis

Lambda Herculis is a star inthe constellation Hercules.It has the traditional name Maasym .In Chinese, , meaning Left Wall of Heavenly Market Enclosure, refers to an asterism which is represent eleven old states in China which is marking the left borderline of the enclosure, consisting of λ...

, μ Herculis

Mu Herculis

Mu Herculis is a nearby star system about 27.1 light years from Earth in the constellation Hercules. Its main star, Mu Herculis A is fairly similar to the Sun although more highly evolved with a...

, ο Herculis

Omicron Herculis

Omicron Herculis is a multiple star system in the constellation Hercules. It has the traditional name Atia and the Flamsteed designation 103 Herculis.- Properties :...

, 112 Herculis, θ¹ Serpentis, η Serpentis

Eta Serpentis

Eta Serpentis is a binary star in the constellation Serpens. The primary, Eta Serpentis A, is an orange K-type giant with an apparent magnitude of +3.23. It has a distant 12th magnitude companion, Eta Serpentis B, 3 arcminutes away...

, ν Ophiuchi

Nu Ophiuchi

Nu Ophiuchi is a Class K0, third-magnitude star in the constellation Ophiuchus. Its closest stellar neighbour is the bright binary system Tau Ophiuchi, roughly 16.9 light years away from the star...

, ξ Serpentis

Xi Serpentis

Xi Serpentis is a triple star system in the constellation Serpens. The primary star, Xi Serpentis A, is a yellow-white F-type giant with an apparent magnitude of +3.54. It is a spectroscopic binary with an orbital period of 2.29 days. A 13th magnitude companion, Xi Serpentis B, is located 25...

 and η Ophiuchi

Eta Ophiuchi

Eta Ophiuchi, also known as η Oph or η Ophiuchi, is a star in the constellation Ophiuchus. It also has the traditional name Sabik....

. Consequently, ζ Aquilae itself is known as , represent the states which have mentioned above.

In the catalogue of stars in the Calendarium of Al Achsasi Al Mouakket, this star was designated Dzeneb al Tair (from ذنب الطائر - ðanab aṭ-ṭā’ir), which was translated into Latin

Latin

Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...

 as Cauda (Vulturis) Volantis, meaning the eagle's tail.

Structure

The primary component, ζ Aquilae A, is a white A-type

Stellar classification

In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...

 main sequence dwarf

Main sequence

The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness. These color-magnitude plots are known as Hertzsprung–Russell diagrams after their co-developers, Ejnar Hertzsprung and Henry Norris Russell...

 with an apparent magnitude

Apparent magnitude

The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere...

 of +2.99. It has two 12th magnitude companions at 6.5 and 158.6 arcseconds from the primary. Zeta Aquilae is approximately 83.2 light years

Light Years

Light Years is the seventh studio album by Australian recording artist Kylie Minogue. It was released on 25 September 2000 by Parlophone and Mushroom Records. The album's style was indicative of her return to "mainstream pop dance tunes"....

 from Earth.

Components

NAME	Right ascension Right ascension Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:...	Declination Declination In astronomy, declination is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is comparable to geographic latitude, but projected onto the celestial sphere. Declination is measured in degrees north and...	Apparent magnitude Apparent magnitude The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere... (V)	Database references
ζ Aquilae B (BD+13 3899B)	01h 09m 42.2s	+35° 36' 54	14.4	Simbad
ζ Aquilae C (BD+13 3899C)	01h 09m 35.334s	+35° 36' 24.4	12.9	Simbad
ζ Aquilae D				Simbad