Sylvain9595's latest activity

Of course, I never thought that my 2D animation could represent the real 3D loops, it's just the "mirror effect" that I didn't expect.

The loops are not representing the complete path of Mars in an Earth-centered frame. They are representing the apparent position of Mars...

This is what I was saying, yes.

No it is not, here's another retrogradation of Mars with the dates : Anyway, even if your image was upside down, the loop would still...

Wait a second, we did solve the problem I outlined in my first message, but now I've run into an even bigger one! Here's the actual...

It is very clear now, I guess I needed a visualisation. Thanks again.

Because, as my post #32 shows, it affects the distance that each planet travels perpendicular to the line of opposition (the major axis...

I've tried constructing an approximate model by using small segments of circles to approximate the elliptical planetary orbits near...

That's a darned impressive animation @Sylvain9595! Did you write that yourself? For those that don't follow the provided link, here is...

No, it starts before opposition. That's obvious from the ephemeris data on JPL Horizons; the reversal of both right ascension and...

You can thank the Claude AI for that, I just gave her the instructions ;)

Minutes in right ascension (RA) are minutes of time, not minutes of arc. One hour in RA corresponds to 15 degrees, but only for motion...

I have to admit you're right! I've created a better animation: Configuration 1 (2003): Earth-Mars distance = 8, Earth's speed = 1.14...

@PeterDonis, I still don't understand why the speed would change the amplitude. There seem to be a problem here : Mars's apparent...

I admit you are right, I get it now. I was too focused on the retrograde motion for some reason...