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NGC6946, NGC6939 and the IFN


NGC6946, NGC6939 and the IFN

Object name
NGC6946, NGC6939 and the IFN

Constellation: Cepheus
Distance of the galaxy: 22 million light years

Imaged by Jean-Yves Beninger from Alqueva Dark Sky, Portugal
On 17, 19 and 21 July 2025

Equipment:
Astro-Physics Mach1
Astro-Physics AP130 Starfire EDF with 2.7" field flattener 67PF562, 873mm
Camera Zwo ASI 2600MM pixel size 3.76ยต
Filters H, R, G, B

RGB, H

Description:

In the constellation Cepheus, a striking trio paints a layered cosmic scene: the Fireworks Galaxy (NGC 6946), the open star cluster NGC 6939, and wisps of Integrated Flux Nebula (IFN).

Though they appear close in the sky, they lie at vastly different distances: NGC 6946 is a starburst galaxy 22 million light-years away, famous for its frequent supernovae. In contrast, NGC 6939 is a much nearer Milky Way cluster, around 4,000 light-years from Earth. Draped over both is the faint glow of IFN, nearby interstellar dust lit by the combined light of our galaxy.

Together, they create a rich, layered portrait of the universe: foreground dust, nearby stars, and a distant galaxy all in one frame.