Theta Ceti
Encyclopedia
Theta Ceti is a Class K0
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...

, fourth-magnitude star
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...

 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....

 Cetus. Theta Ceti is an orange giant star located about 115 light-year
Light-year
A light-year, also light year or lightyear is a unit of length, equal to just under 10 trillion kilometres...

s from Earth.

Name

In the catalogue of stars in the Calendarium of Al Achsasi Al Mouakket, this star was designated Thanih al Naamat (تاني ألنعامة - taanii al naʽāmāt), 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 Secunda Struthionum, meaning the second ostrich. This star, along with η Cet
Eta Ceti
Eta Ceti is a star in the constellation Cetus. It has the traditional name Deneb Algenubi or Algenudi. The name was from Arabic ذنب ألجنبي - ðánab al-janūbii, meaning the southern tail of the sea monster....

 (Deneb Algenubi), τ Cet
Tau Ceti
Tau Ceti is a star in the constellation Cetus that is spectrally similar to the Sun, although it has only about 78% of the Sun's mass. At a distance of just under 12 light-years from the Solar System, it is a relatively close star. Tau Ceti is metal-deficient and so is thought to be less likely to...

 (Thalath Al Naamat), ζ Cet
Zeta Ceti
Zeta Ceti is a star in the constellation Cetus. It has the traditional name Baten Kaitos ....

 (Baten Kaitos)and υ Cet
Upsilon Ceti
Upsilon Ceti is a Class K5, fourth-magnitude star in the constellation Cetus. Upsilon Ceti is a red-orange giant star located about 300 light-years from Earth....

, were Al Naʽāmāt (ألنعامة), the Hen Ostriches.

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 Square Celestial Granary
Bond (Chinese constellation)
Leu sieu meaning "the Train of a garment", was one of the twenty-eight lunar mansions of the traditional Chinese astronomy. It was one of the White Tiger of the West (西方白虎).- The asterisms in the Region of Leu (婁宿天區):...

, refers to an asterism consisting of θ Ceti, ι Ceti
Iota Ceti
Iota Ceti is a star in the constellation Cetus. It has the traditional name Deneb Kaitos Shemali. The name was from the Arabian word ذنب ألشمالي - ðánab al shamāliyy, meaning the northern tail of the sea monster....

, η Ceti
Eta Ceti
Eta Ceti is a star in the constellation Cetus. It has the traditional name Deneb Algenubi or Algenudi. The name was from Arabic ذنب ألجنبي - ðánab al-janūbii, meaning the southern tail of the sea monster....

, ζ Ceti
Zeta Ceti
Zeta Ceti is a star in the constellation Cetus. It has the traditional name Baten Kaitos ....

, τ Ceti
Tau Ceti
Tau Ceti is a star in the constellation Cetus that is spectrally similar to the Sun, although it has only about 78% of the Sun's mass. At a distance of just under 12 light-years from the Solar System, it is a relatively close star. Tau Ceti is metal-deficient and so is thought to be less likely to...

 and 57 Ceti. Consequently, θ Ceti itself is known as
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