NGC6888 in Cygnus, also named as "The Crescent Nebula", has an extension of 20'x 10',and resemble the shape of a bean. It is excited from the extremely hot Wolf-Rayet star HD192163 (magnitude 7,4) which is embedded into the nebula. Visually is a very difficult object, and needs very large telescopes to be detected. With the actual dichroic filters which shows a really narrow bandpass, and with CCD sensors which are sensitive in this band, is quite easy to take nice images also from light polluted sites.
- Camera : Starlight Xpress SXV-H9 with Astronomik filters
- Telescope : Takahashi FS-102 at F/6 with focal reducer on a GM2000-FS2
- Guiding : ST4 on a Vixen 80/910mm.
- Exposure : (Ha-R)RGB - 6x600sec. Ha - 660sec R - 420sec G - 840sec B - All unbinned
- Processing : AIP4WIN (align, combine, stretching and deconvolution) - Astroart (color combine) - Photoshop (final enhancing)
- Location : from my backyard (Castano Primo near Milan)
- Date : June 21, 2003
Click here to see a higher resolution image