Open cluster
Double Cluster (h Persei) (NGC869)
In Perseus (Per) • Magnitude 5.3 • 30 arcminutes
Open the free AstroPlanner with Double Cluster (h Persei) pre-selected, scored against your telescope, location, and the live cloud forecast.
Half of the Perseus Double Cluster, paired with NGC 884.
Double Cluster (h Persei) at a glance
| Catalog IDs | N 869, C 14 |
| Type | Open cluster |
| Constellation | Perseus (Per) |
| Right ascension | 02h 19m 01s |
| Declination | +57° 07' 48" |
| Apparent magnitude | 5.30 |
| Angular size | 30.0 × 30.0 arcmin |
| Max altitude at 45°N | 78° |
| Best imaging months | Sep, Oct, Nov, Dec, Jan |
How to image Double Cluster (h Persei)
Double Cluster (h Persei) sits in the constellation Perseus at right ascension 02h 19m 01s and declination +57° 07' 48". 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.