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Uranian moon system (Read 3739 times)
frankuitaalst
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Uranian moon system
04/22/09 at 11:16:00
 
Herunder is an animation how the Uranian moon system looks for an observer on Earth during 1 Uranian year .  
Visible are Uranus biggest moons Miranda,Ariel, Umbriel, Titania and Oberon.  
Right now the moons are almost "face on" .  
None of the moons is in resonance , contrary to the Jupiter and Saturn system , although strong interactions exist between the moons in a pair like pattern.  
I wondered if the Neptunian system would be under the influence of the Kozai mechanism as the inclination is nearly 90° , but couldn't discover any pattern of this kind on this time scale.
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Uranus_Moons_1_Uranian_y_from_Earth.gif
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frankuitaalst
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Uranian moon system
Reply #1 - 04/22/09 at 13:05:59
 
Although the Uranian system doesn't show any orbital resonances there's a good influence of the nearly equally massive moons on each other .  
The influence seems to be important between the two inner moons Ariel and Umbriel , and Titania and Oberon .  
Especially the changes in eccentricity seem to be related .  
The changes in inclination however  for the inner moons Ariel and Umbriel is not very pronounced .  
 
Edit ; in this comparison I omitted the moon Miranda ( inside Ariels orbit) . This moon shows a lot of dynamics which are not easy to correlate .
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Uranian_Moons_ecc_and_inc.jpg
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frankuitaalst
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Uranian moon system
Reply #2 - 04/23/09 at 13:12:18
 
In a conventional frame , looking from above in xy coordinates and centered on Uranus the orbits of the 5 biggest moons looks as following.
Simulation was run for 1180 years .  
The innermost moon in this simulation is Miranda.  
At first view the animation looks like a small solar system viewed from aside , but this isn't the case ... the view really is top down ...
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UranianMoons_Above1100y.gif
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