M16 Eagle Nebula

Constellation: Serpens        Distance: 5700 lightyears

M16


Click for full resolution (6248 x 4176)

Image spcefications:
  • Exposure: 6 hours, HaO3LRGB = 120:110:50:25:25:25
  • Camera: ZWO ASI2600MM, Temp -10 ° C, Baader LRGB filters, Astrodon 5 nm Ha, 3nm O3
  • Instrument: TEC 140, focal distance 980 mm
  • Mount: Paramount MX+
  • Guiding: TS Off Axisguider, Starlight Xpress Lodestar autoguider and PHD
  • Location: Nozières, France
  • Ambient temperature: round 21° C
  • Date: Between 19 July and 19 August 2023
  • © Frans Kroon, Arno-MarkBlesgraaf

Image acquisition Sequence Generator Pro:
  • 12 H-alpha of 10 min, binned 1x1
  • 11 O3 of 10 min, binned 1x1
  • 5 Lum of 10 min, binned 1x1 not used in processing
  • 5 Red + 5 Green + 5 Blue of 5 min, binned 1x1
  • 25 Flat fields per channel with Flatfield panel
  • 20 Dark frames of 10 min + 20 Dark frames of 5 min + 50 Bias frames

Processed with PixInsight 1.8.9-2:

    Lineair:
  • ImageCalibration and StarAlignment
  • ImageIntegration and ChannelCombination RGB
  • GraXpert on Lum and RGB
  • ImageSolver and SPCC on RGB
  • BlurXTerminator on Ha, O3, Lum and RGB

  • Non Lineair:
  • HistogramTransformation on Ha, O3, Lum and RGB
  • NoiseXTerminator on Ha, O3, Lum and RGB
  • Create StarImage of RGB with StarXTerminator
  • LRGBCombination

  • StarXTerminator on Ha, O3 and LRGB
  • HDRMultiscaleTransform on starless LRGB
  • NBRGBCombination on starless Ha, O3 and LRGB
  • In Photoshop: make background sky dark (25:25:25) with Levels of result NBRGBCombination
  • PixelMath to put them together: StarlessImage + StarImage
  • SCNR
  • HDRMultiscaleTransform