M76 - the 'Little Apple Core'

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M76 - the 'Little Apple Core'

Postby Aratus » Thu Oct 11, 2018 6:05 pm

With a name like 'Little Dumbbell' or 'Little Apple Core', I expected M76 to be smaller, but just as bright as its big brother, the planetary nebula, M27. Actually, it is not a bright object at all, and very much smaller. It is only 10th magnitude, which makes it hard to spot in a telescope. With the ISO set to 6400, a 30sec exposure give a very faint green rectangle with a blob of red at each end. With 6 such images, and messing around with the contract, I managed to get this image. Like its big brother, the rest of the 'apple' is still there, but very tenuous. The 'bright' reddish star on the left is 6th magnitude.
Image
M76 is located on the border of Perseus and Andromeda. It was observed on 10th October at 2010 UT, and I was using the Canon. As you can see, I've had to push the contrast pretty hard. Keen eyes people will have noticed the square stars. This is due to slight movement during the exposure. I need to work on the tracking!
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
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Re: M76 - the 'Little Apple Core'

Postby The Man with the Corrugated Iron Roof » Sun Oct 14, 2018 8:42 pm

We should have a LIKE button on this forum and this would definitely get one from me!

Visually, I found it the most difficult of the Messier objects to find and view.
How can I be one with the universe when we don't know what 96% of it is.

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