Cette région de Cygnus qui contient la nébuleuse circulaire, alias IC 5146, située à l'extrémité de la longue nébuleuse sombre appelée le Cigar foncé mais offici
5400 x 3603 px | 45,7 x 30,5 cm | 18 x 12 inches | 300dpi
Date de la prise de vue:
19 août 2020
Informations supplémentaires:
This area in Cygnus that contains the circular Cocoon Nebula, aka IC 5146, located at the end of the long dark nebula called the Dark Cigar but officially is Barnard 168. The nebulas are flanked by two open star clusters: NGC 7209 at far left just over the border in Lacerta, and Messier 39 at far right. NGC 7209 barely stands out amid the rich starfield here, just below an orange star, while M39 is bright but sparse at right. The clusters and dark nebula stand out well in binoculars but the Cocoon Nebula is a challenge to see in telescopes. This is a stack of 6 x 6-minute exposures with the William Optics RedCat 51mm astrographic refractor at f/5 and the Canon EOS Ra at ISO 800 with LENR on as it was the warmest night of the summer, August 18, 2020. Aligned, stacked and median combined in Photoshop to eliminate some satellite trails. Autoguided with the ZWO ASIAir and ASI120MM guide camera with the RedCat on the Astro-Physics Mach1 mount. No filters employed here.
