Category Archives: Astroimaging

Definitely not a meteorite :(

After M51 I decided to move on to a new target and have a crack at M101, the Pinwheel Galaxy. There’s been a lot of fuss about Elon Musk’s starlink constellation and the effects they’re having, and here’s the first … Continue reading

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A first attempt at M51

Through March and into April I attempted to image Messier 51 with my Skywatcher ED80 and Atik 314L+ (mono). I ended up with twenty-six five-minute luminance exposures and nineteen three-minute exposures for each of red, green and blue for a … Continue reading

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Guidescope in need of TLC

I recently purchased a used Celestron 80mm guidescope with a focal length of 600mm. Normally I’d probably have gone for another ST80, but in fact I wanted this one to use with a slightly longer focal length OTA anyhow, so … Continue reading

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Interesting guiding drift plot

In relatively poor seeing recently, the drift plot for guiding in Ekos showed up like this: An interesting pattern, I thought, like three circles on a line through the centre of the plot. I can’t explain either the circles or … Continue reading

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Odd diffraction spikes from a refractor

The other night I was framing an image using my 80ED and Atik 314L when I noticed that some stars in one corner of the image had odd diffraction spikes: I couldn’t see what the problem was at all at … Continue reading

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Odd Maksutov reflections

The other night when I slewed to a bright star to check the focus on my Skywatcher 127 Mak I got this image from the ASI174MM camera: I’m thinking the off-centre ring must be a reflection of the bright star, … Continue reading

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A revisitation of M27 revisited

A while back I posted an image of M27 and it was suggested that I grabbed some OIII data which would show up the outer wings of the PN. As almost no-one in the UK will be unaware, the weather … Continue reading

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A second attempt at processing the Crescent

I’ve had another crack at this and I think it’s better in some respects, but I’m coming to the conclusion that I really have to get rid of the stars and process them and the nebulosity separately as trying to … Continue reading

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Baby steps around the Crescent

With all the miserable weather we’ve had I’ve finally got things organised to do a bit of processing. Well, organised to do a bit of learning about processing really. When Photoshop-wrangling is required, I am only an egg. So, this … Continue reading

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Adding the TSRED279 reducer/flattener to the Photoline 72

I’m very happy with my little Photoline 72, but with a camera sensor of any size it becomes obvious that the field is far from flat. So much so in fact that it’s sometimes difficult to get Deep Sky Stacker … Continue reading

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