August 2019

The Lagoon Nebula

Messier 8, NGC 6523, Sharpless 25

Image of the Month: The Lagoon Nebula

Image copyright: John Gill

The Lagoon Nebula (catalogued as Messier 8 or M8, NGC 6523, Sharpless 25, RCW 146, and Gum 72) is a giant interstellar cloud in the constellation Sagittarius. It is classified as an emission nebula and as an H II region.

The Lagoon Nebula was discovered by Giovanni Hodierna before 1654 and is one of only two star-forming nebulae faintly visible to the eye from mid-northern latitudes. Seen with binoculars, it appears as a distinct oval cloud-like patch with a definite core. Within the nebula is the open cluster NGC 6530.

This image is a total of 10hr30min integration in narrow-band (Ha, Oiii & Sii) captured over two nights with an APM 107/700 scope on a CGX mount and ZWO 1600mm camera and filters.


5 thoughts on “Current Image of the Month

    1. Allen Versfeld

      Hi Deon
      I chatted to Simon when he submitted the image, and the camera was not piggyback mounted – just sitting on a regular tripod! He was using quite a fast lens, under very dark skies, so the exposure time didn’t have to be very long.

  1. chris

    Brilliant image, are you using “Photoshop”diffraction spikes?
    Now I hope you come to the observatory sometime in the future.
    We do have superb skies.


    1. Leslie Rose

      Hi Chris, Thanks!, I am glad you like the image.
      I have added the diffraction spikes in Photoshop using a very versatile plug-in called StarSpikes Pro 3.
      Hopefully Santa will bring me a 8″ Ritchey Chretien, then i can also have “real” star spikes :-)

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