Tidal Shells of NGC 474 - Adam Lundie - Eatons Hill Observatory

Tidal Shells of NGC 474

Tidal Shells of NGC 474 thumbnail
Tidal Shells of NGC 474
Perhaps too tough of a target for light polluted skies, elliptical galaxy NGC 474 still managed to show some tidal tails / shells from interacting with the nearby spiral galaxy NGC 470.

Elliptal galaxy NGC 467 and a number of distant galaxies are annotated below.

NGC474 annotated


  • 52x300s + 15x90s Lum
  • 31x300s + 7x90s Red
  • 26x300s + 8x90s Green
  • 25x300s + 6x90s Blue

Total integration 12 hours, 4 minutes.


  • Celestron 11" EdgeHD
  • Skywatcher EQ8 Pro mount
  • QSI 683-ws8 Camera @ -15°C
  • Celestron EdgeHD 0.7x reducer
  • Astrodon LRGB Gen2 E-Series Tru-Balance filters
  • Starlight Xpress Lodestar X2 Autoguider
  • Innovations Foresight ONAG
  • Starlight Instruments Feather Touch Focuser


  • Exposed over 6 nights between 4th October and 26th October 2019.
  • Orange zone in Brisbane, Australia. (Bortle 7)


  • Planning & camera alignment with Aladin 10
  • Captured with TheSkyX Professional
  • Guiding with PHD2
  • PixInsight: Calibrate, align, integrate, dynamic background extraction, HDR combination, LRGB combination, noise reduction, photometric color calibration, histogram, HDR multiscale transform, curves, crop.