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General >> Discussion >> Trappist 1 seven planet system
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Message started by frankuitaalst on 02/23/17 at 13:01:54

Title: Trappist 1 seven planet system
Post by frankuitaalst on 02/23/17 at 13:01:54

http://photojournal.jpl.nasa.gov/catalog/PIA21425
Trappist -1 is so much fun .
I know trappist being an excellent beer
https://en.wikipedia.org/wiki/Trappist_beer.
Now it even hosts 7 planets !
In annex a simulation using the GravSim Console .
The initial setting were taken from the document "eso1706a.pdf " .

In the sim all planets were set to a diameter of 6300 km .
Mean anomaly were choosen at random , eccentricities to zero and inclinations to zero .
I think it must be fun to investigate the resonances in rotating frame .

Title: Re: Trappist 1 seven planet system
Post by Tony on 02/23/17 at 16:32:02

Nice work!

Here's a simulation for the browser version:
http://orbitsimulator.com/gravitySimulatorCloud/simulations/1487806670373_trappist1.html

I set the eccentricities to their maximum values. Change the word "stationary" in the dropdown list to one of the planets to rotate the frame. I see a few possible resonances.

Title: Re: Trappist 1 seven planet system
Post by frankuitaalst on 02/25/17 at 10:13:30

Curious about the mutual orbital influences I ran the first  sim for about 40 years .
The system seems remarkably stable . Influences are small.
I tried to find some strong influences , but it seems orbital influences are not easy to find , and are weak ( low mass planets ) .
The plot hereunder seems to indicate couple -wise influences between neighbours.

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