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M76, which is also known as the the Little Dumbbell, Cork or Butterfly Nebula is a planetary nebula about 4.5 light years across and approx 4000 light years distant. It was formed about 10,000 years ago when the central dying star lost a huge amount of matter. The structure of the nebula has two inner lobes and two fainter outer ones. High Ha emissions are present along with OIII emissions which create a the teal (blue/green) cast.
As for the title, the bright star reminded me of Sunrise on Earth, hence the name.
(For the more literal among you, the bright star is HD10498 which has apparent magnitude of 6.6, so you'd probably be unable to see this with the naked eye. It's about 27x the size of our Sun and is approx 900 light years distant).
The LRGB image below represents over 15 hours integration time and was taken with my Esprit 150.
I wish I had the time to go back and re-stack and process all the data obtained over the years, with the benefit of new software and tools. Specifically, using Pixinsight.
But I don't so will just do the best I can with the remaining pictures in my "Still to be Done" folder.
Pretty sure I haven't posted this one before here, although a version with the same data has been on astrobin for a while.
C11 Edge, Atik 428, Ha, Oiii, Sii, RGB filters all mixed, mashed, used and abused.
M76 has some really faint ears at the top end. They only show in Ha exposures, and even then, only just. Hardly ever see them in amateur images, and try as I might, I can't get enough signal from them to bring them out properly. A challenge for another day perhaps.
At the moment it feels like I am juggling too many balls. I have quite a few images waiting in the wings as it were to be processed, but no time to do them justice, but still they come, as at the present moment M109 is rolling off the camera.
So I thought I'd post a couple of previews of stuff in the pipeline. All at long focal length and perhaps a bit different to a standard offering.
None of these images have been calibrated, just taken the lights and stacked them, and with M76 combined the Ha and O3 data to see how it looked. Just basic processing.
All images taken with C11EdgeHD and Atik 428ex, with 7nm Baader Ha filter. Binned 2x2 usually.
Thanks for looking, let me know what you think