Sadr Region

The northern constellation Cygnus, the Swan is oftentimes referred to as the Northern Cross, as its brightest stars resemble a cross, which is a nice counterpart to the Southern Cross constellation.

One distinctive difference between the two cross-shaped constellations is that there is a bright star that marks the “heart” of the northern cross. This star is Sadr, or Gamma Cygni, which is the brightest star in this image.

Surrounding Sadr is an emission nebula designated IC 1318. This is a dim region and challenging to see visually even with a large telescope (at least to the untrained observer). These objects practically leap out to modern (as of early 21st-century technology, anyway) digital cameras, however, as demonstrated by this image.

There are some targets that require many hours of imaging using narrowband filters to even start to appear. A relatively shallow exposure (total exposure time of just a little over three hours) reveals an impressive depth of detail as can be seen. In fact, this image was just a “test” image but is attractive enough that I decided it worth it to share. I hope to revisit this region in the not too distant future.

Data for this image was gathered over two nights (August 31 and September 4, 2025).

A wider field version of this region can be found here.