Английская Википедия:Delta1 Gruis

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Шаблон:Short description

Шаблон:Other stars by Bayer designation Шаблон:Starbox begin Шаблон:Starbox image Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end Delta1 Gruis, Latinized from δ1 Gruis, is a candidate binary star[1] system in the constellation Grus. With a peak apparent visual magnitude of 4.0 it is bright enough to be seen with the naked eye at night. The distance to this system, as determined using an annual parallax shift of 10.54 mas as seen from the Earth,[2] is around 309 light years. It is gradually moving away from the Sun with a radial velocity of +4.9 km/s.[3]

The brighter component of this system is an evolved, yellow-hued, G-type giant star with a stellar classification of G6/8 III.[4] It is a semiregular variable that ranges between apparent magnitudes 3.99 and 4.2,[5] located 325 light-years from Earth. Delta1 Gruis has around 3 times the mass and 24 times the diameter of the Sun. The fainter companion is a magnitude 12.8 star at an angular separation of 5.6 arc seconds, as of 2008.[1]

See also

References

Шаблон:Reflist

Шаблон:Stars of Grus

  1. 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок Eggleton2008 не указан текст
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  5. Ошибка цитирования Неверный тег <ref>; для сносок AAVSOdel2 не указан текст