This is the rich area of nebulosity in central Cygnus that includes the Crescent Nebula (aka NGC 6888) at left, and the Tulip Nebula (aka Sharpless 2-
This is the rich area of nebulosity in central Cygnus that includes the Crescent Nebula (aka NGC 6888) at left, and the Tulip Nebula (aka Sharpless 2-101) at right near the star Eta Cygni. The small circular red HII nebula at lower left is Sh 2-104, while the faint arc of whitish OxygenIII nebulosity below centre is the Wolf-Rayet nebula WR134. The Crescent Nebula is another Wolf-Rayet object, WR136, made of material expelled by stellar winds from a very hot central star. The long dark nebula above centre is B145, from Edward Emerson Barnard's catalog, while the mass of large dark nebulas of varying densities at right is collectively catalogued by Beverly Lynds as Lynds Dark Nebula LDN 862. The star cluster Messier 29 is just in the field at lower left. Many other minor star cluster dot the field. This is a stack of 8 x 8-minute exposures at ISO 3200 through an IDAS NBX narrowband nebula filter to isolate the Ha and OIII emission lines, blended with a stack of 10 x 8 minute exposures with no filter (to retain natural star colours) at ISO 800, all with the AstroGear filter-modified Canon R, and on the Sharpstar 61 EDPH III refractor at with its Reducer. Autoguided on the Astro-Physics Mach1 mount with the MGENIII autoguider. Taken from home on a very fine night, May 15/16, 2023. Stacked, aligned and blended in Photoshop. A "starless" layer created with RC-Astro Star XTerminator provides most of the nebula content, enhanced with luminosity masks and a Nebula Filter action from PhotoKemi Tools.
Size: 6700px × 4460px
Photo credit: © Alan Dyer / VWPics / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 61mm, 862, 6871, amazing, astro, astrogear, astronomical, astronomy, astrophotography, b145, canon, cosmos, crescent, cygni, cygnus, do39, do40, edph, emission, eta, filter, idas, ldn, lumenzia, mgeniii, narrowband, nbx, nebulas, ngc, photokemi, science, sh-2-101, sh2-101, sh2-104, sharpstar, skies, sky, star, tulip, unique, wolf-rayet, wr134, wr136, xterminator
