Open cluster
Pearl Cluster (NGC3766)
In Centaurus (Cen) • Magnitude 5.3 • 6.9 arcminutes
Open the free AstroPlanner with Pearl Cluster pre-selected, scored against your telescope, location, and the live cloud forecast.
Bright open cluster in Centaurus.
Pearl Cluster at a glance
| Catalog IDs | N 3766 |
| Type | Open cluster |
| Constellation | Centaurus (Cen) |
| Right ascension | 11h 36m 14s |
| Declination | -61° 36' 19" |
| Apparent magnitude | 5.30 |
| Angular size | 6.9 × 6.9 arcmin |
| Max altitude at 45°N | Below horizon |
| Best imaging months | Mar, Apr, May |
How to image Pearl Cluster
Pearl Cluster sits in the constellation Centaurus at right ascension 11h 36m 14s and declination -61° 36' 19". 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.