Open cluster
NGC 6940 (NGC6940)
In Vulpecula (Vul) • Magnitude 6.3 • 11 arcminutes
Open the free AstroPlanner with NGC 6940 pre-selected, scored against your telescope, location, and the live cloud forecast.
Open cluster in Vulpecula.
NGC 6940 at a glance
| Catalog IDs | N 6940 |
| Type | Open cluster |
| Constellation | Vulpecula (Vul) |
| Right ascension | 20h 34m 27s |
| Declination | +28° 16' 58" |
| Apparent magnitude | 6.30 |
| Angular size | 10.8 × 10.8 arcmin |
| Max altitude at 45°N | 73° |
| Best imaging months | Aug, Sep, Oct |
How to image NGC 6940
NGC 6940 sits in the constellation Vulpecula at right ascension 20h 34m 27s and declination +28° 16' 58". 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.