Английская Википедия:Iris Nebula

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Шаблон:Short description Шаблон:Infobox nebula The Iris Nebula (also known as NGC 7023 and Caldwell 4) is a bright reflection nebula in the constellation Cepheus. The designation NGC 7023 refers to the open cluster within the larger reflection nebula designated LBN 487.

The nebula, which shines at magnitude +6.8, is illuminated by a magnitude +7.4 star designated HD 200775.[1] It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alfirk). It lies 1,300 light-years away and is six light-years across.[2]

Notes

Файл:NGC7023map.png
Map showing location of NGC 7023

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References

External links

Шаблон:Commons category

Шаблон:WikiSky Шаблон:Sky

Шаблон:Catalogs Шаблон:Caldwell catalogue Шаблон:Ngc75 Шаблон:Cepheus (constellation)