Nebulae in Cygnus, C19 and C27

Nebulae in Cygnus, C19 and C27

8th and 9th June 2024.

Moving on from small or very distant galaxies, I turned to objects within our own Milky Way galaxy. These are both nebula in the constellation of Cygnus, so looking along the plane of the milky way. So, both images contain a very rich star field. The first is Caldwell 19, aka the Cocoon Nebula, a combination of emission/reflection nebula. Figures I have seen suggest the nebula is a mere 3200 light years distant, with a diameter of around 15 light years. From my image, the bright part for the nebula would be less than 10 light years across at that distance The second is Caldwell 27, aka the Crescent nebula (or even the Ear nebula) an emission nebula about 5000 light years away, which will the order of 30 light years across.

(Click/Tap the images to go to better resolution versions)

Image details for C19:
1000 mm focal length at f/5
125 30 second exposures at ISO 6400. Sony A6300 camera.
Mid point 00:45 BST on 8th June 2024.

Image details for C27:
1000 mm focal length at f/5
176 25 second exposures at ISO 6400. Sony A6300 camera.
Mid point 01:07 BST on 9th June 2024.

For both targets I also took a sequence of images with a QHY 5III174 camera and the 50 mm diameter finder 'scope. I was hoping to see some more nebulosity with this, that would persuade me to once again try it on the big 'scope.
It's a pig to focus this (focuser too stiff), so on the first evening these images did not cut the mustard. They were not too bad on the second evening, so here's the result:

There is no evidence of any more nebulosity in this image.
Image details for this one:
205 mm focal length at f/4.1
148 27 second exposures at Gain 330. QHY 5III174 camera.
Mid point 01:07 BST on 9th June 2024.

That's the end of the Nebulae in Cygnus post.


Remember, check out the home page of this blog for other posts, including the best images from previous years.

Comments

  1. Anonymous19 June 2024 at 12:13

    Thanks Mike. Mind blowing info again. I can't get my head around a nebula being 15 light years across !

    ReplyDelete
    Replies
    1. Mike Scarisbrick19 June 2024 at 15:20

      Thanks Anonymous :) I wouldn't want to driving round one of those nebulae, especially if I still had the Lada!

      Delete

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