Please wait for the animation to completely load.

A planet has an initial velocity in the y direction that gives it a slightly elliptical orbit around a star as shown in the animation (position is given in 10⁶ km and time is given in years). Restart.

1. Determine the mass of the star.
2. What is the correct orbital radius to give circular motion? Drag the planet at t = 0 to determine this radius. You may also drag the gray blocks around to use them as temporary or permanent markers.