Iris Nebula
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| Reflection nebula | |
|---|---|
 Iris Nebula (NGC 7023 and LBN487) | |
| Observation data: J2000.0 epoch | |
| Right ascension | 21h 01m 35.60s |
| Declination | +68° 10′ 10.0" |
| Distance | 1,300 ly |
| Apparent magnitude (V) | 6.8 |
| Apparent dimensions (V) | 18' x 18' |
| Constellation | Cepheus |
| Physical characteristics | |
| Radius | 3 ly |
| Designations | NGC 7023 and LBN487, Caldwell 4 |
The Iris Nebula, also known as 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
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External links
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Wikimedia Commons has media related to NGC 7023. |
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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
- Iris Nebula on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
_by_G%C3%B6ran_Nilsson,_Hole_Observatory.jpg)
