The pulsar is in a very short period, circular orbit.
Both are moving in nearly circular orbits taking 66.6 and 98.2 Earth days to complete.
The secondary is following a circular orbit with a period of 205.2 days.
He quoted the case of two bodies each in circular orbit.
It travels in a low, circular orbit with a period of about 95 minutes.
Consider for example a circular orbit that passes directly through the center of force.
They are following circular orbits with a period of nearly 133 days.
Instead of its usual almost circular orbit, the planet was now moving away from the sun.
Here, each planet has a circular orbit around the host star.
You also need a quadrupole moment, so a circular orbit won't do.