Английская Википедия:64 Aquilae

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64 Aquilae, abbreviated 64 Aql, is a star in the equatorial constellation of Aquila. 64 Aquilae is its Flamsteed designation. It is a faint star that requires good viewing conditions to see, having an apparent visual magnitude of 5.97.[1] The distance to 64 Aql, as determined from its annual parallax shift of 2Шаблон:Val,[2] is 152.2 light years. At that distance, the visual magnitude of the star is diminished by an extinction of 0.029 due to interstellar dust.[3] It is moving closer to the Earth with a heliocentric radial velocity of −3.6 km/s.[4]

This is an evolved giant star currently on the red giant branch[3] with a stellar classification of K1 III/IV.[5] The luminosity class of 'III/IV' indicates the spectrum shows a blend of features matching a subgiant and giant star. It is around 6.2 billion years old with 1.17 times the mass of the Sun and has expanded to 4.5 times the Sun's radius.[4] The star is radiating 11[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,786 K.[4]

References

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Шаблон:Stars of Aquila

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  3. 3,0 3,1 Ошибка цитирования Неверный тег <ref>; для сносок Jones2011 не указан текст
  4. 4,0 4,1 4,2 Ошибка цитирования Неверный тег <ref>; для сносок Villaver2013 не указан текст
  5. Ошибка цитирования Неверный тег <ref>; для сносок Houk1999 не указан текст