Английская Википедия:28 Aquilae
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28 Aquilae, abbreviated 28 Aql, is a star in the equatorial constellation of Aquila. 28 Aquilae is its Flamsteed designation though it also bears the Bayer designation A Aquilae, and the variable star designation V1208 Aquilae. It has an apparent visual magnitude is 5.5,[1] making this a faint star that requires dark suburban skies to view (according to the Bortle Dark-Sky Scale). The annual parallax shift of Шаблон:Val means this star is located at a distance of approximately Шаблон:Convert from Earth.
The spectrum of this star matches a stellar classification of F0 III.[1] Despite consistent spectral classifications as a giant star,[2] models show that it is just reaching the end of its main sequence lifetime at an age of 655 million years.[3]
The variability of 28 Aquilae was discovered by Michel Breger in 1969. It was revealed to be a Delta Scuti-type pulsating variable star with at least two periods of pulsation. The known periods have frequencies of 6.68 and 7.12 cycles per day.[4] The outer atmosphere has an effective temperature of 7,250 K,[1] which lies in the range of a yellow-white hued F-type star.[5]
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- Английская Википедия
- Aquila (constellation)
- Double stars
- F-type giants
- Delta Scuti variables
- Bayer objects
- Flamsteed objects
- Henry Draper Catalogue objects
- Objects with variable star designations
- Hipparcos objects
- Bright Star Catalogue objects
- Durchmusterung objects
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
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- Статья из Английской Википедии
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