Uranus With 4 Moons

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Uranus with 4 moons
Taken by Peter Rosén on October 11, 2015 @ Central Stockholm, Sweden

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Camera Used: Canon Canon EOS 5D Mark II
Exposure Time: 45/1
Aperture: Unavailable
ISO: 1600
Date Taken: 2015:10:25 09:22:37

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This is the first time I have been able to photograph Uranus with 4 of its largest moons. So far I have photographed a total of 20 moons in the solar system: Earth: 1 Mars: 2 Jupiter: 5 Saturn: 7 Uranus: 4 Neptun: 1 /*Peter R

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Wonderful image! What size telescope (and what camera)did you use?

Posted by jhaklar 2015-10-25 13:20:48

Thank you Jim,
I used a William-Optics FLT-110 APO-triplet with TEC-optic (f/6.5 FL: 715 mm) and a very good flattener.
The camera is a full-frame Canon Eos5D MkII.
Normaly I would use a planetary camera but I wanted a huge starfieldfield around Uranus and am myself somewhat surprised that the the moons are so well separated from Uranus.

/*Peter R

Posted by Peter R 2015-10-25 15:18:13

Thank you, Peter, for the information. I really want to try imaging Uranus like you have done. I am amazed that you captured the moons with such a small telescope. What exposure(s)and image processing did you use?

Posted by jhaklar 2015-10-27 05:40:04

In Photoshop CS6, I have manualy stacked 7 images shot at 30 sec. and 1,600 iso each.
They were shot in Raw and developed in Camera Raw to preserve a maximum of details in the highlights, otherwise Ariel and Umbriel can easily disappear in the overexposed light around Uranus.
It is also good to plan ahead when Ariel and Umbriel are as close as possible to their maximum elongation. In my picture Ariel for example is at 9 arcseconds from the rim of the planet but can be as little as 5 arcseconds which is a much less optimal position.

Hope this helps and that you will be successful in your attempt.

/*Peter R

Posted by Peter R 2015-10-27 13:04:13

Peter, you are a wealth of information. Thanks!

Posted by jhaklar 2015-10-27 14:06:40

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