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Eta Aquilae

 

 
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Eta Aquilae
 
 
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Eta Aquilae (? Aql / ? Aquilae) is a star
Star

A star is a massive, luminous ball of Plasma that is held together by its own gravity. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth....
 in the constellation
Constellation

A constellation is a group of stars that appear to have a physical proximity in the sky. The stars in a constellation are often vastly distant from each other, but they appear close to each other from the perspective of Earth....
 Aquila
Aquila (constellation)

Aquila is a constellation. Its name is Latin for 'eagle' and it is commonly represented as such. It lies roughly at the celestial equator. The alpha star, Altair, is a vertex of the Summer Triangle asterism ....
. It was also part of the former constellation Antinous
Antinous (constellation)

Antinous is an obsolete constellation no longer in use by astronomers, having been merged into Aquila, which it bordered to the North.The constellation was created by the Roman Emperor Hadrian in 132....
. In addition, this star carries the seldom used Hebrew
Hebrew language

Hebrew is a Semitic languages of the Afro-Asiatic languages. Modern Hebrew is spoken by more than seven million people in Israel and Classical Hebrew is used for prayer or study in Jews communities around the world....
 name Bezek or Bazak, meaning "lightning".

It is a Cepheid variable
Cepheid variable

A Cepheid variable or Cepheid is a member of a particular class of variable stars, notable for a fairly tight correlation between their period of Radial pulsations and absolute luminosity....
 star, varying from apparent magnitude
Apparent magnitude

The apparent magnitude of a celestial body is a measurement of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the Earth's atmosphere....
 3.6 to 4.4 with a period of 7.176641 days. Along with Delta Cephei
Delta Cephei

Delta Cephei is a binary star system approximately 891 light-years away in the constellation of Cepheus . The names Alrediph, Al Radif or variants are derived from the Arabic "??????" , or "the Follower"....
, Zeta Geminorum
Zeta Geminorum

Zeta Geminorum is a star in the constellation Gemini . It also has the traditional name Mekbuda.It is located on the outstretched left "leg" of the twin Pollux ....
 and Beta Doradus
Beta Doradus

Beta Doradus is the second brightest star in the constellation of Dorado . It is a Cepheid variable, with an apparent visual magnitude which varies between 3.46 and 4.08....
, it is one of the most prominent naked eye
Naked eye

The naked eye is a figure of speech referring to human visual perception that is unaided by enhancing equipment, such as a telescope or microscope....
 Cepheids; that is, both the star itself and the variation in its brightness can be distinguished by the naked eye.






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Eta Aquilae (? Aql / ? Aquilae) is a star
Star

A star is a massive, luminous ball of Plasma that is held together by its own gravity. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth....
 in the constellation
Constellation

A constellation is a group of stars that appear to have a physical proximity in the sky. The stars in a constellation are often vastly distant from each other, but they appear close to each other from the perspective of Earth....
 Aquila
Aquila (constellation)

Aquila is a constellation. Its name is Latin for 'eagle' and it is commonly represented as such. It lies roughly at the celestial equator. The alpha star, Altair, is a vertex of the Summer Triangle asterism ....
. It was also part of the former constellation Antinous
Antinous (constellation)

Antinous is an obsolete constellation no longer in use by astronomers, having been merged into Aquila, which it bordered to the North.The constellation was created by the Roman Emperor Hadrian in 132....
. In addition, this star carries the seldom used Hebrew
Hebrew language

Hebrew is a Semitic languages of the Afro-Asiatic languages. Modern Hebrew is spoken by more than seven million people in Israel and Classical Hebrew is used for prayer or study in Jews communities around the world....
 name Bezek or Bazak, meaning "lightning".

It is a Cepheid variable
Cepheid variable

A Cepheid variable or Cepheid is a member of a particular class of variable stars, notable for a fairly tight correlation between their period of Radial pulsations and absolute luminosity....
 star, varying from apparent magnitude
Apparent magnitude

The apparent magnitude of a celestial body is a measurement of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the Earth's atmosphere....
 3.6 to 4.4 with a period of 7.176641 days. Along with Delta Cephei
Delta Cephei

Delta Cephei is a binary star system approximately 891 light-years away in the constellation of Cepheus . The names Alrediph, Al Radif or variants are derived from the Arabic "??????" , or "the Follower"....
, Zeta Geminorum
Zeta Geminorum

Zeta Geminorum is a star in the constellation Gemini . It also has the traditional name Mekbuda.It is located on the outstretched left "leg" of the twin Pollux ....
 and Beta Doradus
Beta Doradus

Beta Doradus is the second brightest star in the constellation of Dorado . It is a Cepheid variable, with an apparent visual magnitude which varies between 3.46 and 4.08....
, it is one of the most prominent naked eye
Naked eye

The naked eye is a figure of speech referring to human visual perception that is unaided by enhancing equipment, such as a telescope or microscope....
 Cepheids; that is, both the star itself and the variation in its brightness can be distinguished by the naked eye. Some other Cepheids such as Polaris
Polaris

Polaris is the brightest star in the constellation Ursa Minor. It is very close to the north celestial pole , making it the current northern pole star....
 are bright but have only a very small variation in brightness.

It is about 1200 light years from Earth. It is a yellow-white supergiant
Supergiant

Supergiants are among the most massive stars. In the Hertzsprung-Russell diagram they occupy the top region of the diagram. In the spectral classification supergiants are class Ia or Ib ....
, and is about 3000 times more luminous than the Sun
Sun

The Sun , a G V star, is the star at the center of the Solar System. The Earth and other matter orbit the Sun, which by itself accounts for about 98.6% of the Solar System's mass....
, with a diameter about 60 times that of the Sun.

Location

Aquila Constellation Map
The star's location in the constellation of Aquila is shown on the above map.

External links