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Ursa Astronomical Association
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Ursa Astronomical Association

Abell 50 NGC 6742 - 3.10.2021 at 20.30 - 4.10.2021 at 02.00 Imatra Observation number 101724

Visibility II / V

Rauno Päivinen, Etelä-Karjalan nova

In the constellation of the dragon, right next to the Swan, there is one of the planetary nebulae on the Abell list, Abell 50. The object is also listed on the NGC list under number 6742. The nebula is a little over 30 arcseconds very noticeable from a dark spot with a 20cm tube and an OIII filter. When photographed, both OIII and H-alpha gave an almost similar result.

I collected a HOO version of the picture where H-alpha is placed in red and OIII in blue and green color channels. This small object does not seem to have been photographed very diligently, although it is very noticeable and can be found in the high sky.

The second image shows the OIII stack and the third the H-alpha stack

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • Abell 50 NGC 6742
  • Constellation
    • Draco
  • Brightness in magnitudes
    • 13.4
  • Field of view
  • 22 arc minutes
  • Darkness
    • Mediocre
  • Seeing
    • Average
  • Nebulae
    • Planetary nebula info

      Planetary nebula is the remnant of a death star. It could be ring-shaped, disc-like or spread out rather irregularly.

      With the exception of some nearest objects planetary nebulae have a small apparent diameter and they need a rather big instrument to be visible.


      Planetary nebula M27 aka The Dumbbell Nebula in Vulpecula. Image Juha Parvio.


      M76 aka The Little Dumbbell Nebula in Perseus. Image Rauno Päivinen.

Technical information

Celestron C14 SCT. Optec 0.5X focal length reducer. Atik 460EX camera. Astrodon 3nm OIII and 5nm h-alpha filters

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