The Iris Nebula (NGC 7023) is a glowing blue reflection nebula in the constellation Cepheus, about 1,300 light years away. At its centre is the hot star HD 200775, whose light is scattered by fine dust particles, creating the characteristic blue shimmer. Around the bright core spread dark, cold dust clouds — part of the vast molecular complex Cepheus Flare, an active star-forming region.
| IMAGE DATA | |
|---|---|
| Object | NGC 7023 - Iris-Nebula |
| Distance | approx. 1300 light years |
| Date | 18.10.2025 |
| Exposure | RGB each 20x 180sec. & Luminance 140x 180sec. , - Total 10h |
| Mount | Skywatcher EQ6-R Pro |
| Telescope | Askar 120APO with 0.8x Reducer |
| Camera | ZWO ASI 2600mm with ZWO LRGB Filter |
| Guiding | Zwo Asi OAG with ZWO Asi 290mm Mini & Asiair |
| Software | AsiAir, Astropixel Processor, Pixinsight, Photoshop CC, NoiseXterminator, Star X Terminator, BlurXterminator, Nik Collection 7 |