Iris nebula

The Iris Nebula, also NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +7 star, SAO 19158.[1] It shines at magnitude +6.8. It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alphirk). It lies 1,300 light-years away and is six light-years across.[2]

Notes

References

External links

  • SEDS – NGC 7023
  • Simbad – NGC 7023
  • VizieR – NGC 7023
  • NED – NGC 7023
  • Dark Atmospheres Photography – Iris Nebula NGC 7023
  • See NGC 7023 in WorldWide Telescope
  • Iris Nebula on Articles and images

, +68° 09′ 48″