Sh2-101 Tulip Nebula

Constellation: Cygnus        Distance: 6.000 lightyears

Sh2-101

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Click for full resolution in HaRGB (3296 x 2432)
Click for full resolution Ha (3296 x 2432)

Image spcefications:
  • Exposure: 5,5 hours, HaRGB = 160:55:55:55 minutes
  • Camera: SBIG ST-8300M, Temp -15 ° C, Baader RGB filters
  • Instrument: TEC 140 with field flattener, focal distance 980 mm
  • Mount: Losmandy G11
  • Guiding: TS Off Axisguider, Starlight Xpress Lodestar autoguider and PHD
  • Location: Etoile St. Cyrice, France
  • Sky Quality Meter: between 21,25 and 21,44
  • Ambient temperature: between 20° C and 18° C
  • Date: 19 and 20 august 2012

Image acquisition with ImagesPlus 4.0 Camera Control with dither:
  • 8 H-alpha of 20 min, binned 1x1
  • 11 Red + 11 Green + 11 Blue of 5 min, binned 2x2
  • 20 Flat fields per channel with Aurora Flatfield panel
  • At home, camera in fridge:
  • 20 Dark frames of 10 min + 20 Dark frames of 5 min
  • 20 Flat darks (per channel) + 20 Bias frames

Processing in PixInsight 1.7
  • ImageCalibration, ImageIntegration, StarAlignment, ChannelCombination
  • BackgroundNeutralization, ColorCalibration, HistogramTransformation
  • LRGBCombination, ACDNR, CurvesTransformation, SCNR
  • HDRMultiScaleTransform, PixelMath
  • Ha and RGB combined with method Vincent Paris

Processing in Photoshop CS3:
  • Levels