NGC 7331 Group

14. September 2020 - Zimmerwald, Bern

Processing:

  • Stacking in Pixinsight: WeightedBatchPreprocessing
  • RGBCurveAlign
  • DynamicCrop
  • DynamicBackgroundExtraction
  • BackgroundNeutralization
  • PhotometricColorCalibration
  • Denoise: EZ Denoise Script
  • HistogramTransformation
  • Deconvolution
  • CurvesTransformation
  • Final adjustments in Lightroom

Subframe analysis:

  • Median ADU starts with hight values, as it is still dusk and gets lower until 02:30 LT, where the moon rises over the horizon, resulting in a ascending Median ADU.
  • SNR is clearly reciprocal to the Median ADU.

 

Select option

Exposure Time

  • 190 × 120 s Gain 240 Color
6 h 20 min

Calibration

Center (RA, DEC) 339.2460, 34.4222
Size 0.593 × 0.383 deg
Radius 0.353 deg
Avg. Distance to Moon 118.13 deg
Avg. Moon phase
14.19 %