NGC 7129 is a striking reflection nebula in the constellation Cepheus, around 3,300 light years away and about 10 light years in size. Its bluish glow comes from the light of young stars reflected off interstellar dust, while dark molecular clouds reach into the bright areas. Embedded within is a young open star cluster whose energetic radiation and stellar winds shape the surrounding gas. Not far away lies the smaller reflection nebula IC 5134, also part of this active star-forming region. Further east glows the much older open star cluster NGC 7142, surrounded by reddish emission arcs of ionised hydrogen. Together they paint a high-contrast picture of the birth and ageing of star clusters in our galaxy.
| IMAGE DATA | |
|---|---|
| Object | NGC7129 |
| Distance | approx. 3,300 light years |
| Date | 07., 09. & 14.08.2025 |
| Exposure | RGB each 30x 120sec., Luminance 148x 120sec. & Halpha 122x 300sec. - Total approx. 18.1h |
| Mount | Skywatcher EQ6-R Pro |
| Telescope | Askar 120APO with 0.8x Reducer |
| Camera | ZWO ASI 2600mm with ZWO LRGB & Ha-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 |