Kappa Aquilae

Kappa Aquilae, Latinized from κ Aquilae, is the Bayer designation for a star in the equatorial constellation of Aquila. It is a faint star at apparent visual magnitude +4.957, but bright enough to be seen with the naked eye in dark suburban skies. The annual parallax is only 1.94 mas, which equates to a distance of approximately  from Earth (with a 10% margin of error).

The spectrum of Kappa Aquilae matches a stellar classification of B0.5 III, where the luminosity class of III is typically associated with evolved giant stars. This is a star with 15.50 times the Sun's mass and 12.5 times the radius of the Sun. Massive stars like this blaze brightly; it is radiating 52,630-fold the Sun's luminosity from its outer atmosphere with an effective temperature of 26,500 K, giving it the intense blue-white glow of a B-type star. It is only 11 million years of age and is spinning rapidly with a projected rotational velocity of 265 km/s.

Etymology
In Chinese,  (), meaning Right Flag, refers to an asterism consisting of κ Aquilae, μ Aquilae, σ Aquilae, δ Aquilae, ν Aquilae, 42 Aquilae, ι Aquilae, HD 184701 and 56 Aquilae. Consequently, the Chinese name for κ Aquilae itself is  (, .)

This star, together with η Aql, θ Aql, δ Aql, ι Aql and λ Aql were consist Antinous, the obsolete constellation.

References

External links
 Image Kappa Aquilae
 HR 7446

184915
Aquilae, Kappa
Category:Aquila (constellation)
Category:B-type giants
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Aquilae, 39
7446
BD-07 5006