Open cluster
NGC 7129 (NGC7129)
In Cepheus (Cep) • Magnitude 11.5 • 2.1 arcminutes
Open the free AstroPlanner with NGC 7129 pre-selected, scored against your telescope, location, and the live cloud forecast.
Reflection nebula in Cepheus with a young embedded cluster.
NGC 7129 at a glance
| Catalog IDs | N 7129 |
| Type | Open cluster |
| Constellation | Cepheus (Cep) |
| Right ascension | 21h 42m 59s |
| Declination | +66° 06' 47" |
| Apparent magnitude | 11.50 |
| Angular size | 2.1 × 2.1 arcmin |
| Max altitude at 45°N | 69° |
| Best imaging months | Aug, Sep, Oct, Nov |
How to image NGC 7129
NGC 7129 sits in the constellation Cepheus at right ascension 21h 42m 59s and declination +66° 06' 47". To frame and integrate it well, AstroPlanner will compute the optimal moonless window for tonight from your location, the field-of-view fit against your sensor and focal length, the suggested total integration time given your aperture and sky Bortle class, and a cloud-aware schedule that drops it from the plan if your nearest cloud forecast spike overlaps the best altitude window.