SH2-86 is an emission nebula in constellation Vulpecula with an apparent diameter of about 40' (arcminutes). The nebula is not very bright but contains some interesting pillar-structures and Bok globules.
If is assumed that the nebula is ionized by the Vulpecula OB1 association which lies at a distance of about 6000 ly from Earth () and which contains NGC 6823, the star cluster in the center of the nebula.
0.69° × x 0.61°
400mm Newton at f=1200mm
North is up (approximately)
1 arcsec/pixel (at full resolution)
Total exposure times:
All image processing steps are deterministic, i.e. there was no manual retouching or any other kind of non-reproducible adjustment. The software which was used can be downloaded here.
Image processing steps where:
Bias correction, photon counting
Dark current subtraction, flatfield correction, noise estimation
Alignment and brightness calibration using stars from reference image
Stacking with masking unlikely values and background correction
Extracting stars from the emission line images using information from continuum images
Denoising and deconvolution both components (stars and residual)
Dynamic range compression using non-linear high-pass filter