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Ursa Astronomical Association
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Ursa Astronomical Association

M65, M66, NGC 3628 - 18.3.2021 at 04.00 Fregenal de la Sierra, Espanja Observation number 96904

Visibility IV / V

Tapio Lahtinen, Tampereen Ursa

I decided to illuminate the famous ‘Lion Trinity’ from the spring galaxy sky.
The intention was to illuminate for so long as to bring out the tidal tail of the NGC 3628 galaxy. 20 hours was the goal, but from the data I brutally worse off that the result was 'only' 17.5 hours left.

Despite the amount of exposure, getting the tail out was painful and the background sky could have been better.

However, as a bonus image, I got an X-ray from the NGC3628 galaxy and a few quasars. These are marked in another picture.
More information about the tail and quasars here .

Edit: 13.5. I added another processed image.

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • M65, M66, NGC 3628
    • Näyttävä
  • Constellation
    • Leo
  • Galaxies
    • Spiral galaxy info

      Spiral galaxy is a stellar system where there are outwards arched spiral arms from roundish (spiral galaxies) or bar-shaped (barred spiral galaxies) central condensation.

      The apparent shape of spiral galaxied depends on out observation direction. From above they are quite round. From the side they lens-shaped with a bulge in the middle.

      Generally a rather large instrument, good weather conditions and observational expereince are needed to see spiral arms. Usually spiral galaxies look like a fuzzy spots.

      Spiral galaxy M33 in Triangulum. Image Tero Turunen.


      Andromeda Galaxy M31. There are also galaxies M110 (upper right corner) and M32 (lower left corner) in this image. Image Pekka Peura.

      M101 aka Pinwheel Galaxy in Ursa Major. Image Samuli Vuorinen.


      Spiral galaxy IC 342 aka Hidden Galaxy in Camelopardalis. Image Timo Inkinen.

      A sketch of spiral galaxy NGC 7331 in Pegasus. Image Juha Ojanperä.

Technical information

Sky-Watcher Esprit 100ED, 10 Micron GM 1000 HPS, Atik 460EX. Exposure totaling about 17.5 hours.

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