When shooting fast-rotating planets (Jupiter, Saturn) with color and monochrome cameras, the following limitation arises: the duration of shooting a single video clip should not exceed a few minutes. Due to the rapid rotation of the details of the planets blurred when added. This is especially critical when shooting with monochrome cameras, where very little time is left for shooting each channel. The program WinJUPOS allows you to compensate for the rotation of the planet, using several images as a texture and “pulling” them on a virtual globe.
Initially, WinJUPOS was supposed to process material from monochrome cameras, but I successfully use this program to work with a color camera. At the same time, the image detailing improves, fine details are better drawn, the picture becomes less noisy. In this manual, I’ll tell you how to stack colored stacks in WinJUPOS. The process of shooting is that we shoot not one clip, but several with a small interval. Then we process each video, we get the result of the addition (stack) and apply wavelets to each stack. You can find out how to shoot planets in general in the corresponding article. https://star-hunter.ru/en/planetary-imaging/
Download WinJUPOS can be absolutely free here.
We also need Registax
Suppose you got a number of stacks and applied wavelets to them. Stacks for training you can download the link: Stacks_for_WJ_Saturn_06_07_2015
-telescope Celestron NexStar 8 SE
-Barlow lens Sky-Watcher 2x with T-adapter
-camera ZWO 120 MC.Each of the stacks is the result of the addition of 1500 frames from 4994, the duration of each video is 3 minutes. After the addition, wavelets in the Astra Image program are applied to the stacks.Download WinJUPOS (hereinafter for simplicity, simply WJ), install, run. Select the type of planet, specify the working directory (folder with stacks):
We see such a picture – the planet, a contour-template is superimposed on it. In my case, the image is already aligned, but you will need to rotate the template and adjust it to fit the size of the planet, it is easy. First, we fill in the date, time (international) and geographical coordinates of the location of the shooting. The shooting time of each stack is indicated in the file name – for example, the stack 215758_pipp_g4_ap72 was shot at 21:57 local time and at 18:57 international time (minus three hours). It is 18:57 and we score in the appropriate field. In theory, it is more correct to specify the time between the beginning and the end of the recording of the video, but for simplicity we will use only the start time of the recording. When shooting a planet near midnight, be careful with the date!
Your task is to impose a pattern exactly on the contour of the planet.
Important note: when processing the stacks of Jupiter, just press the F11 button, and the image will automatically align. Alas, with Saturn, this trick does not roll.
Well, it turned out:
Now we turn to derotation, that is, we “stop” the rotation of the planet:
I like this color balance very much – this is what Saturn looks like when viewed through a telescope. However, according to common practice, this color balance is not very welcome and therefore we will resort to autobalance:
You can save several variants of wavelet processing – for example, on one result the cloudy belts of the planet are better visible, on the other – the rings are better worked. Their further combination is already carried out in graphic editors. If necessary, adjust the levels, add the saturation and we get as a result: