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Jupiter taken on 06/15/2018

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Jupiter taken on 06/15/2018

Postby andrewscomputers » Fri Jun 15, 2018 12:53 am

Hi all I took these images and I only got 20 images and used autostakkert to stack, before the clouds rolled in again.I used a 3xbarlow with my skywatcher 80 ed refractor.Thanks for looking.
Andy
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Re: Jupiter taken on 06/15/2018

Postby Aratus » Fri Jun 15, 2018 1:36 pm

Great minds think alike. You must have taken your photo about 10 minutes after mine. It shows the same main features. The Great Red Spot is very prominent, as is a festoon coming south from the NEB.

I'm surprised that with a 3x barlow that the image of Jupiter isn't a bigger one. Can you not use your camera/imager to zoom into the 'point of interest' (Jupiter, in this case)?
The image you have posted is only 600 x 480. Was the original bigger? If you could zoom into the original image with that same resolution it might be even better.

In my example I used 1024 x 680 resolution. I cropped it slightly, and then reduced the size to 80%. The image was then 650 x 410, but the planet takes up more of the space, and looks bigger.
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
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Re: Jupiter taken on 06/15/2018

Postby andrewscomputers » Fri Jun 15, 2018 5:56 pm

Hi Aratus thanks for the reply,I didn't try to get zoomed in as I could only manage 20 images before it was hidden behind the clouds.I had to take the image down as it was originally 1500 pixels and looked to big for the forum.We must have been on the same brain wave to get the same image.I like your image aswell.
Thanks
Andy
andrewscomputers
 
Posts: 189
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Re: Jupiter taken on 06/15/2018

Postby Aratus » Fri Jun 15, 2018 7:05 pm

Try cropping the original rather than reducing the size. That will give you a better resolution, and an apparently bigger image. I also came in early as some thin cloud knocked down the brightness of the image.
Unfortunately, as you appreciate 20 images will not give the best photo. With my photo I was able to take 2000 images, and I picked the best 150 to stack. There was a lot of turbulent atmosphere, and a lot of bad images to remove. I did another run of 1000 images and picked the best 75. Not surprisingly that one was not quite as good. I'd go for even more images, but unfortunately Jupiter spins on its axis quickly, and the features will blur with the movement. Also the stacking software can crash if the files are too big.
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
Aratus
 
Posts: 838
Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire


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