Author Topic: [Theme] Show us your best moon (and solar system) images  (Read 151732 times)

Øivind Tøien

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Re: [Theme] Show us your best moon (and solar system) images
« Reply #975 on: December 12, 2022, 07:21:25 »
I had another go at Jupiter during a clear night November 16. It is also is in a good position close to earth now, although only maxing out at 23° altitude at my location. I found a time that offered som interesting interaction with the moons and the Great Red Spot. As for the Mars images, Jupiter is bright enough to be captured with the 300mm f.4 PF+TC-14E+TC-20E III @ f/13 on Nikon 1 AW1 and adapter at ISO 160, bursts of 60 fps -1/60 sec exposures. Each Jupiter stack was typically 400-500 frames over about 3 min. Some gaps from battery and card change were interpolated using WinJupos. Due to the low resolution it was not possible to detect the moons at this exposure - they had to be exposed separately with series of 30-60 frames at 1/4 sec exposure between the Jupiter exposures, and stacked and composited with the Jupiter stacks. This resulted in moons getting a bit on the bright side compared to what is realistic.

The moons from left to right are Io, Ganymede, Europa with Callisto to the far right. In this frame Ganymede is in front of Jupiter, and is hard to see, but there is a darker area that manifests on Jupiter's surface about 1/4 in from the right edge. The shade from Ganymede on the surface would be right inside the edge.
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The Great Red Spot is just showing up on the left edge, and Ganymede has just stepped out and revealed itself more clearly.



The Great Red Spot in a more prominent position.
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And then the full 19 frame animation lasting about 100 minutes. The Ganymede shade is prominent in the first few frames on the right, and then the Great Red Spot rotates in from the left. It took quite a few trips through PIPP and GIMP to get things lined up.
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A  line up of all the Jupiter stacks including Ganymede in some of them. (Open in new tab and click for full detail.)
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Nasos Kosmas

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Re: [Theme] Show us your best moon (and solar system) images
« Reply #976 on: December 12, 2022, 18:40:08 »
Excellent Oivid :)
My own tries still very poor :(

Øivind Tøien

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Re: [Theme] Show us your best moon (and solar system) images
« Reply #977 on: December 12, 2022, 23:56:27 »
Thanks Nasos, and do not give up. The processing with centering in PIPP, stacking in Autostackert and careful wavelet sharpening in Registax is essential for these results to appear, besides the tedious manual compositing and adjustment of rotation angle for the animation.  Attached is an original crop from PIPP of one of the very best frames and worst frames for one of the capture periods. For Jupiter I stacked the 30% best frames (about 150 frames each) while for the moons I used the best 50% (about 20 each) to cheat shorter periods of bad atmospheric conditions. I initially tested multiple percentages to find the best balance between noise and blurriness.
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Akira

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Re: [Theme] Show us your best moon (and solar system) images
« Reply #978 on: December 13, 2022, 03:26:06 »
That is a great improvement, Øivind!  Congrats!
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

Øivind Tøien

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Re: [Theme] Show us your best moon (and solar system) images
« Reply #979 on: December 13, 2022, 05:34:31 »
Thanks Akira, while some of it is improvement in the processing (particularly in Registax), more stable atmospheric conditions were probably also contributing compared to the last capture that I presented.
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pluton

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Re: [Theme] Show us your best moon (and solar system) images
« Reply #980 on: December 18, 2022, 07:16:36 »
Late in the day, after moonrise.  180mm on APS-C.
Keith B., Santa Monica, CA, USA

Øivind Tøien

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Re: [Theme] Show us your best moon (and solar system) images
« Reply #981 on: January 11, 2023, 13:27:44 »
Nice repetition of shape in the building structure, Keith.

Last full moon, or actually the day before, I tried to getter a better capture of this moon phase. Seeing seemed pretty good, with minimal wobbling of the image, but low transparency caused original captures to look slightly blurry. Same equipment as my planet captures, stacked the best 30% of about 500 frames. This time I used the new wavelet sharpening tool called waveSharp that is a rewrite of parts from Registax by the original author. Final processing and cropping in CNX2. Open in new tab and click for full resolution.

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While at it I could not resist the temptation to recomposite it with the Mars image to recreate the simulated conjunction with a better quality moon image.
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