| Iris Nebula | |
|---|---|
Iris Nebula (NGC 7023 and LBN487) |
|
| Observation data: J2000.0 epoch | |
| Type | Reflection |
| 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 |
| Other designations | NGC 7023 and LBN487, Caldwell 4 |
| See also: Diffuse nebula, Lists of nebulae | |
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]
Coordinates: 21h 01m 36s, +68° 09′ 48″
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