Jupiter 15/03/08

[Matty P (Matt)]

This is probably the worst imaging run of Jupiter I have had yet. This is only the third to date so not is all bad.

I was expecting the seeing to be above average but I was terribly wrong. I firstly thought that the collimation was off producing a blurry image. The day before I had installed Bob's knobs and had set the collimation to what I thought was pretty well perfect. I double checked on a star and found that the scope was in almost perfect collimation.

Analysing the AVI's, I was saddened to find the conditions to be worse that I first thought. There were only a couple of AVI's that were worthy of processing.

Another thing, I was wondering why there were onion rings are present on these images. I positive I didn't under or over exposure any AVI's.

Although of the horrible conditions, I will post a few images from this morning. All were taken with the DMK shooting at 60fps with a 1/60s exposure time.

1. Jupiter and Ganymede

2. Jupiter

3. Jupiter, Ganymede, Io and Europa. (left to right)

What was I doing wrong?

[ronnierigel]

Hi Matt
Good effort
Inevitably onion rings occur when the seeing is bad and you push the wavelets too far to bring up detail. Technically, I 've wondered whether it has something to do with the pulsation of the planet's perimeter resulting in uneveness which becomes enhanced during processing.
Someone else may have a better explanation.
Wait for a better day and post back---most interested in your posts because of your similar aperture to one of my scopes!
ron

[Matty P (Matt)]

Originally Posted by ronnierigel

Hi Matt
Good effort
Inevitably onion rings occur when the seeing is bad and you push the wavelets too far to bring up detail. Technically, I 've wondered whether it has something to do with the pulsation of the planet's perimeter resulting in uneveness which becomes enhanced during processing.
Someone else may have a better explanation.
Wait for a better day and post back---most interested in your posts because of your similar aperture to one of my scopes!
ron

Thanks for the reply Ron,

I was really dissapointed when I compared the images from my last imaging run to these. The only difference was the seeing conditions.

I guess that every image you take can't be perfect. I will keep trying.