Taken around 10:50pm on Sun 16 March.
IS DBK 21 on Celestron C11 with 2x Barlow
500 frames at 1/30sec stacked in AutoStakkert and post processed in Registax
The shadows are of Io and Ganymede.
(http://www.markshelley.co.uk/Astronomy/2014/jupiterdoubleshadow16032014.jpg)
Here's one from earlier in the evening just after Ganymede had passed in front and before its shadow was cast on Jupiter:
(http://www.markshelley.co.uk/Astronomy/2014/jupitergany16032014.jpg)
Mark
Mark
I was wondering if you managed to get these last night. Great images, well done.
Tony G
Very nice Mark well done
Good effort, gald to see the wind was better on Sunday night.
Quote from: Ivor
Good effort, gald to see the wind was better on Sunday night.
Guiding was much better than Saturday. I was getting 0.4arcsec RMS for long periods on my belt drive EQ6. It occasionally went above 0.5 RMS. The type of the seeing conditions helped. It was the high speed "jittery" kind of seeing instead of the "slow wave". Guiding works much better with the former.
Very nice indeed Mark - looks spot on to me. You did well... John
I particularly like the one with the red spot.
Carole
Very nice Mark
Really nice that.
Very nice,
Mac.
Nice Mark. i did do one, with only one moon, myself but looks a bit tatty. scope not big enough!!!!!!
Quotescope not big enough
But I thought size didn't matter :oops:
it does in a lot of matters Mick ;)
I've managed to tease just a bit more detail out of the Jupiter/Ganymede image by using 2500 frames instead of 500. Here they are side by side:
(http://www.markshelley.co.uk/Astronomy/2014/jupitergany16032014.jpg)(http://www.markshelley.co.uk/Astronomy/2014/jupgany16032014v3.jpg)
Certainly a lot more detail Mark, was definitely worth doing. Looks like a bit of detail showing on Ganymede.
Carole
Quote from: Carole
Looks like a bit of detail showing on Ganymede.
Yes, the dark and light areas on Ganymede are just beginning to show now and they're genuine. I've compared with similar images from folk who did much better than me on the same night.
looks excellent Mark... Can you get rid of the ring artifacts down the RHS & I'd give it 10/10.... John
Quote from: JohnP
looks excellent Mark... Can you get rid of the ring artifacts down the RHS & I'd give it 10/10.... John
Those ring (or bacon rind) artifacts are a common problem. I think they are an artifact of the wavelets rather than a misregistration of video frames (we had the same discussion on Fay's recent image). Lots of Jupiter images have them and others have edges very obviously blurred, which also looks really wrong.
I think the solution may be to produce 2 images: one where wavelet decon is applied just up the point where the bacon rind has not yet started to appear and then another image where "full strength" wavelets is applied but which has bacon rind. The two images can then be judiciously layered together to obtain the best of both.
Then you can give me 10/10 ;)
For John's benefit then, here is the final version on the right (or underneath), without bacon rind.
(http://www.markshelley.co.uk/Astronomy/2014/jupgany16032014v3.jpg)(http://www.markshelley.co.uk/Astronomy/2014/jupgany16032014v4.jpg)
Nearly as many sequels as Rocky!
Mark