Tuesday, June 1, 2021

Elephant's Trunk Nebula in HOO

Elephant's Trunk in HOO

HOO == Hydrogen Alpha to Red Channel; Oiii to Green Channel; Oiii to Blue Channel. 


Equipment:

Capture Device: Beelink Mini PC using Microsoft RDP to control

Optics: SGO 6" f/4 Imaging Newtonian @ 610mm FL
             Baader 2" HR Coma Corrector

Camera: ZWO ASI294mm Pro

Filters: ( ZWO 7nm  Ha & ZWO 7nm Oiii)

Mount: Losmandy GM811

Guiding: ZWO 120mm + PHD2 Software

Acquisition: Sequence Generator Pro 

Exposures: 

  • Ha (Gain 200/Offset 21) - 18 exposures @ 180 Seconds (54 Minutes)
  • Oiii (Gain 200/Offset 21) - 60 exposures @ 180 Seconds (3 Hours)

Calibration: 50 Bias, 30 Darks, 50 Flats per filter

​Processing: PixInsight

Notes:

  • (18) of (41) 180s Ha exposures (Thin clouds washed out the other 23)
  • Best guiding I've ever had after tightening up my Dec axis. .55 Total RMS... even with dithering.
  • Seeing = Average
  • Transparency = Average

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