Cygnus Loop

Designation: Sh2-103
Hemisphere: Northern
Constellation: Cygnus
Distance: 2,500 light years
Object type: Supernova Remnant


Named after its host constellation (Cygnus, the Swan), the Cygnus Loop is a large supernova remnant (SNR) -the leftovers of a massive stellar explosion that occurred 15,000 to 20,000 years ago, according to NASA.

The complex includes several nebulas, such as the Lacework Nebula, the Veil Nebula, and the nebulae NGC 6960, 6979, 6992, and 6995. They are highlighted in the image below.

Latest measurements from Gaia indicate that the Cygnus Loop lies some 2,500 light-years away from Earth, and is about 120 light-years in diameter. It is believed that the original supernova would have been so bright that could have been clearly seen from Earth with the naked eye.


Mount: ZWO AM5
Main Telescope: William Optics Redcat 51
Main camera: ZWO ASI294MC-Pro
Main camera filter: Optolong L-Ultimate 3nm
Guidescope: Svbony SV165 30/120
Guide camera: ZWO ASI174MM
Guide camera filter: Astronomik UV/IR cut

Acquisition details

Total integration time: 12 hours 10 minutes
Acquisition: ZWO AsiAir Plus
Processing: PixInsight
Location: Luxembourg

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