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Catalogue and alternative designations The NGC 3166 galaxy group.  From top to bottom NGC 3165, NGC 3166 and NGC 3169

 

Type Galaxies 
Position 10 13 46.2, +03 25 03 NGC 3166
Constellation Sextans
Camera and Telescope STXL6303 and 36.8 cm Ritchey Chretien
Focal Ratio F9
Exposure Details  LRGB 140:60:60:50  using Astrodon series 2 filters.  Luminance unbinned, Colours binned 2x2
Description NGC 3166 and NGC 3169 are two interacting galaxies physically close to each other about 75 million light years distant.  The third smaller galaxy is NGC 3165.  NGC 3169 is about magnitude 10.3 and 4.2' x 2.9' in size.