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| Common Name: | Iris Nebula |
| Formal Name: | NGC 7023 |
| Date: | 6/23/2015 |
| Constellation: | Cepheus |
| Location: | Casa Grande |
| Hardware: | Takahashi Sky90 on Paramount, SBig ST2000XM Camera/Filter Wheel
unguided exposures |
| Temperature: | -0C |
| Bin Mode: | 1×1 |
| Images: | (x) x 15 minute Red exposures (x) x 15 minute Green (x) x 15 minute Blue Total Time = x hours Sky Flat fields |
| Processing: | This version uses only RGB exposures (Synthetic Lum by integrating RGB). Reduced in Maxim, Aligned/Stacked/Processed in PixInsight |
| Notes: | 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. 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.. (Wikipedia) |
BrewSky Observatory 