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Saturn and its companions

A peep at Saturn's neighborhood



The satellites in the above picture are numbered as follows (verified with WinJupos):
  1. Japetus
  2. Rhea
  3. Tethys
  4. Dione
  5. Titan
Some technical info on the above image:
  • Location: Varese, Italy
  • Telescope: Celestron C11 riding on a G11 mount
  • Camera: Lumenera Lu075 at the C11's prime focus
  • Seeing: godawful (around 3-4/10)...
  • Exposure time: B/W movie @15 fp; 62 ms exposure time for the satellites (Saturn completely burned out), 2.5 ms exp time for the planet (satellites invisible). This yielded two separate exposures by stacking around 300 out 500 frames for each image.
  • Composite image made with Photoshop CS3



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