Globular cluster
Omega Centauri (NGC5139)
In Centaurus (Cen) • Magnitude 3.9 • 55 arcminutes
Open the free AstroPlanner with Omega Centauri pre-selected, scored against your telescope, location, and the live cloud forecast.
The largest and brightest globular cluster in the Milky Way.
Omega Centauri at a glance
| Catalog IDs | N 5139, C 80 |
| Type | Globular cluster |
| Constellation | Centaurus (Cen) |
| Right ascension | 13h 26m 49s |
| Declination | -47° 28' 48" |
| Apparent magnitude | 3.90 |
| Surface brightness | 11.4 mag/arcsec² |
| Angular size | 55.0 × 55.0 arcmin |
| Max altitude at 45°N | Below horizon |
| Best imaging months | Mar, Apr, May, Jun |
How to image Omega Centauri
Omega Centauri sits in the constellation Centaurus at right ascension 13h 26m 49s and declination -47° 28' 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.