Galaxy
Antennae Galaxies (NGC4039)
In Corvus (Crv) • Magnitude 10.7 • 5.4 arcminutes
Open the free AstroPlanner with Antennae Galaxies pre-selected, scored against your telescope, location, and the live cloud forecast.
Southern component of the Antennae interacting pair.
Antennae Galaxies at a glance
| Catalog IDs | N 4039 |
| Type | Galaxy |
| Constellation | Corvus (Crv) |
| Right ascension | 12h 01m 53s |
| Declination | -18° 53' 10" |
| Apparent magnitude | 10.70 |
| Surface brightness | 22.8 mag/arcsec² |
| Angular size | 5.4 × 2.7 arcmin |
| Max altitude at 45°N | 26° |
| Best imaging months | Mar, Apr, May |
How to image Antennae Galaxies
Antennae Galaxies sits in the constellation Corvus at right ascension 12h 01m 53s and declination -18° 53' 10". 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. As a galaxy, Antennae Galaxies needs the darkest skies you can find: surface brightness, not just apparent magnitude, drives whether it will lift out of the gradient.