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Poslaťod MichaelDike » 12. Jún. 2018, 13:44:00
HI,

I have some time using Celestia and I know how to do some basic topics. But now, I'd like to start to do some binary systems, but I don't know how to calculate the semi major axis of the stars that compose the system. I found some formulas in Wikipedia, but I can?t undestand them.For example, I create a barycenter in x position. Then, I choose 2 stars which I can use as a model. In this case:Epsilon Reticuli with 1.2 solar masses and
HD 63454 whith 0.8 solar masses.I'm just gonna get the absolute magnittude and the class to make my fictional stars in Celestia. But I want to calculate the semi major axis of both stars respect to the barycenter using the masses of the stars.
Can anybody please help me with a formula to calculate this?

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:
https://celestia.space/forum/viewtopic.php?f=15&t=13528
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Thank you.
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