Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  LBN 193  ·  LBN 203  ·  LBN 206  ·  LBN 208  ·  NGC 6881  ·  NGC 6888  ·  PK074+02.1  ·  Sh2-105
Crescent Nebula NGC 6888, Robert H. Kutner
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Crescent Nebula NGC 6888

Crescent Nebula NGC 6888, Robert H. Kutner
Powered byPixInsight

Crescent Nebula NGC 6888

Equipment

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Acquisition details

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Description

300 sec x 10 each filter @ 100 gain and -10 C 

Dynamic narrowband combinations with PixelMath 

Sii/Ha/Oiii :

R = Oiii*Sii + ~Oiii*(.1*Sii+.9*Ha)
G = Ha*(0.7*Ha+0.3*Oiii) + ~Ha*Oiii
B = Oiii*Oiii + ~Oiii*(.3*Sii+.7*Oiii)

L = Ha @ 0.5 Lightness/Saturation

Processing: Software-

DSS- Stacked each filter set w/ 25 flats, 25 darks, & 50 bias
PixInsight- StarAlignment, ABE for Oiii and Sii, DBE for Ha, PixelMath, SCNR for 0.8 green reduction, EZ Processing Suite for Denoise, Deconvolution, Morph T, HDR Transform, Star Reduction, Dynamic Crop, HDR T, Curves T, Color Sat, and Geometry for 180 flip.

Comments

Sky plot

Sky plot

Histogram

Crescent Nebula NGC 6888, Robert H. Kutner

In these public groups

Cloudy Nights