On October 6, Mars, which was approaching this year, shined brightly in the night sky and was seen quite large.
Unfortunately, for a while before and after that day, I couldn't shoot the planet because of my work.
Furthermore, due to poor weather, I was finally able to shoot on November 15th, more than a month after Juntendo's approach.
It was.
The final output image of Mars taken at that time is the photo below.
The shooting location is a place called Orollesailier, 70 km south of Nairobi.
This time, I will introduce a picture of Mars at that time.
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By image processing, the pattern emerged so far
This time as well, I used the magnified shooting method.
The photo above, north, south, east and west have been corrected, so the photo above is north and the right is east.
What I felt after shooting this time was that even though it was only 40 days since the opposition to the Earth, "Mars is so lacking!"
Compared to the semi-large approach of the geocentric distance on October 6, 0.414 AU, apparent diameter 22.6 ", the geocentric distance at the time of shooting is 0.541 AU, apparent diameter 17.3" diameter, which is about 30% smaller. ..
(Data is calculated by Stella Navigator 95.)
If you look closely at the photo, you can see the polar caps in the North Pole and the South Pole.
Neither is so big.
It's not water, it's a snowfield of dry ice.
Mars rotates 25 degrees on its axis, so there are seasonal changes, just like Earth.
From the position of the polar cap in the image, the North Pole side is tilted toward the sun.
Inferring from the fact that the polar cap of the Northern Hemisphere still remains, the Northern Hemisphere is probably spring or early summer.
If you look closely, you can see a long, narrow white line extending from the lower right near the high latitudes in the south.
Is the strong wind blowing and the sand being rolled up?
On Mars, like the moon, the dark part on the surface is called the sea.
In reality, even though it is called the sea, it does not mean that there is water.
Image, black part in the upper left of the center, probably large Syrtis, small Syrtis in the lower right from here.
The slightly bright part below it is the Hellas basin.
Isn't it? !!
With a 500mm telephoto lens for photography, you can observe the details of Mars so far.
I wanted to take it when I was approaching a quasi-large.
Shooting method
This time, I shot it in the same way as I introduced in the previous shooting of Jupiter in Goyon.
The lens is Nikon's Ai Nikkor 500mm f4P, and the camera is Panasonic GH4.
All images are open f4!
The video shot was processed with Registax6 as usual, and the final processing was composited in Photoshop and finished by adjusting the tone.
I've been able to do a lot of the compositing work and work that I'm repeating in the continuous shooting of the sun, and I've come to spend much less time on the processing.
The above photo is composed by changing the material and trying various things with different processing in Registax6.
One difference from the previous shooting of Jupiter is that in order to make Mars, which is only a small image on the screen, look bigger, the original image is enlarged by 200%, and each pixel is shifted and combined. There is.
This pixel shift technique can be expanded while suppressing deterioration of image quality, so it can be used quite well.
Will the previous image of Jupiter be more detailed if the pixel shift processing is performed?
Let's try it soon.
By the way, this time as well, Jupiter and Saturn, which are appearing in the lower part of the western sky, were also photographed before shooting Mars.
However, due to the surprisingly bad seeing, Jupiter and Saturn are moving as if they were kneaded in the finder screen.
Since the image is unlikely to be expected, output processing is not performed.
Mars orbits outside the Earth and closest to the Earth.
It moves a little slower than the Earth and moves in parallel with the Earth, so it will show up in the night sky for quite a long time.
Conversely, it can be said that the invisible period is long.
Next year, on January 22, we will head to Tonori (in the Northern Hemisphere, it will be just south at sunset), and the next approach to the earth will be December 1, 2022.
The meeting period between Earth and Mars is every two years and two months.
Next time is a small approach that is not so close compared to the previous (July 31, 2018) large approach and this semi-large approach (October 6, 2020).
We have to wait until July 2033 for the quasi-large approach where Mars looks big again, and until September 2035 for the large approach.
The orbit of Mars is a fairly elliptical orbit, and for a while it will meet with the Earth in its large bulge.
13 years later, the next semi-large approach, by that time, the shooting equipment will have changed significantly.
At that time, human beings may have reached Mars.
Isn't it?
So, this is my first blog in a while.
My head is stiff, so I'm not going to reopen my blog here.
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