HD 117440

d Cend Centauri
HD 117440, also known by its Bayer designation d Centauri (d Cen), is a binary star in the constellation Centaurus.wikipedia
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Bayer designation

Bayerdesignationdesignations
HD 117440, also known by its Bayer designation d Centauri (d Cen), is a binary star in the constellation Centaurus.
Examples include s Carinae (s of the constellation Carina), d Centauri (d of the constellation Centaurus), G Scorpii (G of the constellation Scorpius), and N Velorum (N of the constellation Vela).

Binary star

spectroscopic binaryeclipsing binarybinary
HD 117440, also known by its Bayer designation d Centauri (d Cen), is a binary star in the constellation Centaurus.

Constellation

constellationsEuropean constellationModern constellation
HD 117440, also known by its Bayer designation d Centauri (d Cen), is a binary star in the constellation Centaurus.

Centaurus

Cena picture of himselfCentaur
HD 117440, also known by its Bayer designation d Centauri (d Cen), is a binary star in the constellation Centaurus.

Light-year

light yearlight yearsly
It is approximately 900 light years from Earth.

Earth

terrestrialworldGlobal
It is approximately 900 light years from Earth.

Stellar classification

spectral typeK-typeG-type
Both components are yellow G-type giant stars.

Giant star

giantorange giantgiants
Both components are yellow G-type giant stars.

Semi-major and semi-minor axes

semi-major axissemimajor axissemi-major axes
The two stars orbit around their common centre of mass once every 83 years and the secondary has a semi-major axis of 0.161 arcseconds.

Minute and second of arc

masarcsecondarc second
The two stars orbit around their common centre of mass once every 83 years and the secondary has a semi-major axis of 0.161 arcseconds.

Astronomical naming conventions

formally designatednaming conventionalso written
After all twenty-four Greek letters have been assigned, upper and lower case Latin letters are used, such as for A Centauri (A Cen), D Centauri (D Cen), G Scorpii (G Sco), P Cygni (P Cyg), b Sagittarii (b Sgr), d Centauri (d Cen) and s Carinae (s Car).

Zeta Centauri

ζ CenAlnair in Centaurusζ Centauri
In Chinese, 庫樓 (Kù Lóu), meaning Arsenal, refers to an asterism consisting of ζ Centauri, η Centauri, θ Centauri, 2 Centauri, HD 117440, ξ 1 Centauri, γ Centauri, τ Centauri, D Centauri and σ Centauri.

Theta Centauri

θ Cenθ CentauriMenkent
In Chinese, 庫樓 (Kù Lóu), meaning arsenal, refers to an asterism consisting of Theta Centauri, Zeta Centauri, Eta Centauri, 2 Centauri, HD 117440, Xi¹ Centauri, Gamma Centauri, Tau Centauri, D Centauri and Sigma Centauri.

Gamma Centauri

γ Cenγ CentauriMuhlifain
In Chinese, 庫樓 (Kù Lóu), meaning Arsenal, refers to an asterism consisting of γ Centauri, ζ Centauri, η Centauri, θ Centauri, 2 Centauri, HD 117440, ξ 1 Centauri, τ Centauri, D Centauri and σ Centauri.