Iris Nebula
Template:Short description Template: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
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References
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External links
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- SEDS – NGC 7023
- VizieR – NGC 7023
- NED – NGC 7023
- Dark Atmospheres Photography – Iris Nebula NGC 7023
- See NGC 7023 in WorldWide Telescope
Template:Catalogs Template:Caldwell catalogue Template:Ngc75 Template:Cepheus (constellation)