NGC 7331 Group

14. September 2020 - - Zimmerwald, Bern
16. September 2020

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.

 

Plots
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Exposure Time

  • 190 x 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 %

Guiding

RMS (RA, DEC) 0.76 ", 0.72 "
RMS Total 1.05 "
Polar Alignment Error 32.3 '

Objects in picture

NGC 7331 NGC 7335 NGC 7337 NGC 7340 NGC 7336 NGC 7327 IC 1450 NGC 7325 NGC 7326 NGC 7333 NGC 7338