The butterfly nebula is a two-lobed nebular object that, when viewed in visible light or in false color images, takes on an apparent structure resembling the appearance of a butterfly.
IC 1318 nebula is a large area of emission nebulosity around Sadr, Gamma Cygnii, the brightest star in this image. The two sections of nebulosity to the left of Gamma are called the Butterfly Nebula and have the catalog designation of IC 1318. LDN 889 is the large area of dark nebulosity that separates the two halves of the Butterfly Nebula, and B 343 is the small but very dense dark nebula surrounded by the clouds of nebulae on the right side of the image. This is a large area of emission nebulosity around Sadr, Gamma Cygnii, the brightest star in this image.

Ha(28*5min) SII(26*5min) OIII(37*5min)
Total : 8h. Out temperature : 8°C. In CCD temperature : -25°

Calibration, Registration, Color stack with CCDstack 1.0 (CCDIS plug-in). Level and curves adjustements with Photoshop CS3. Final processing with PIXINSIGHT 1.2