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Here is a cropped,annotated still from the video showing the arm. The arm can be found in the ISS Intravehicular Equipment Catalog as MULTIUSE BRACKET PART NO. SEG33107631-301, pictured therein (in a low-res fashion). A vendor is not given, but we in Spaceflight Training colloquially referred to these gadgets as "Bogen arms". The online Bogen ...


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There are several ways to do this. The easiest and most straightforward is to break it into two sets by including velocity as a variable, and solve together. Instead of a single second order differential equation $$\ddot{\mathbf{r}} = -\frac{\mu}{r^3}\mathbf{r}$$ We can solve the following pair of first order differential equations in parallel $$\dot{\mathbf{...


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