The Transit of Callisto, 17 March 2016Home

Jupiter reached opposition on 13th March 2016 so that after that the shadows follow their satellites.  You can see that in the pictures below.  Sadly conditions were not good with light cloud moving over, so the pictures are not as good as I would like.

All pictures were taken from .avi files made by a DFK21AF04 camera attached to my LX200.  The first two pictures were taken at prime focus, the others using my ×2 SLR lens.

Firstly here are two full-width pictures, the first taken before the transit finished and before the shadow transit began; the second at the end of my imaging session (shortly before the clouds thickened).  Move your mouse over the images to see the satellites identified.

Time: 20:59
Exposure: (not recorded but likely between 1/38 and 1/77 sec)
Frames stacked: 98
Wavelets: Gaussian Scheme 10

This is the first time I have clearly imaged a satellite in transit.  I am surprised it is dark, but have no doubt that it is Callisto.
Time: 22:34
Exposure: 1/77 sec
Frames stacked: 114
Wavelets: Gaussian Scheme 10

And now here are four pictures taken during the transit with my ×2 lens fitted.

Time: 21:07
Exposure: 1/38 sec
Frames stacked: 238
Wavelets: Gaussian Scheme 10
Gamma reduced to 0.6
Here Callisto is in transit.  It is the dark spot at the top of the planet. Time: 21:48
Exposure: 1/77sec
Frames stacked: 117
Wavelets: Gaussian Scheme 10
Gamma reduced to 0.7
The transit of Callisto has finished.  Callisto can be see just to the right of the planet near the top.  The shadow transit has started  It is the dark spot on the left of the planet.
Time: 21:50
Exposure: 1/23 sec
Frames stacked: 145
Wavelets: Gaussian Scheme 10
Gamma reduced to 0.7
This is only 2 minutes later but  I think you can see that Callisto has moved as has its shadow. Time: 22:27
Exposure: 1/19 sec
Frames stacked: 126
Wavelets: Gaussian Scheme 10
Gamma reduced to 0.7
Thirty-seven minutes later and you can see that Callisto has moved well away from the planet and the shadow has moved almost half way across.  You may also notice that Jupiter has rotated a significant amount and that the satellites orbit in the same direction as the planet rotates.



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