Tracker can measure positions relative to other features in the video, such as other stars. You will need night sky images over a period of time (weeks to months) to trace it's retrograde motion.


> Re: relative movement
>
> Hi
> I want to study the movement of Mars in relation
> to the Earth and show that it has a retrograde movement,
> it is necessary to trace its trajectory in a geocentric
> referenctial .How can I do it tanks