# Tag Info

Accepted

### Why are asteroids with zero orbital inclination rare?

Short answer: The scarcity of asteroids with an inclination near zero is an expected result of normally distributed inclinations in 3-dimensions about the normal vector to the reference plane, rather ...
• 15.4k
Accepted

### How do tadpole, horseshoe co-orbital states arise and how are they stable?

If the body is in front of the planet (relative to the planet's orbital motion) and a little further from the sun, it will orbit the sun slightly slower than the planet. As it is slower, the planet ...
• 96.2k
Accepted

### At what point are orbital resonances no longer "ordered" but "chaotic?"

Consider a child on a stationary swing. The fastest way to get them going is to push once every time they swing (a 1:1 resonance). If you push 581 times for every 137 swings, the pushes will mostly ...
• 15.4k
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### Planetary orbital resonances

This is actually a very subtle question, much more so than the answers to the similar questions provided in the comments give it credit for. When I was in graduate school at Ohio State I routinely ...
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### What exactly was the Moon's "Evection Resonance"?

The orbit of the moon is elliptical. But the direction of the major axis of this ellipse isn't fixed. Perturbation by the sun causes the axis to rotate towards the East. The time for the moon to go ...
• 96.2k
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### Stability of orbital resonance

I am not very familiar with orbital dynamics (so please correct me if I'm wrong). I was told that, for instance in the case of the mean motion resonances that cause the majority of the Kirkwood gaps ...
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### Why are asteroids with zero orbital inclination rare?

In spherical polar coordinates, one of the coordinates used is an angle between the direction to a point in space and a "pole". Let this "pole" be the ecliptic north pole and call ...
• 124k
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### When will Callisto be in orbital resonance with the rest of Jupiter's big moons?

we tried to answer to this question in this article: https://arxiv.org/abs/2001.01106 According to the current estimation of the tidal dissipation in the Jovian system, we expect that Callisto will be ...
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### What exactly was the Moon's "Evection Resonance"?

Does this simply mean that the angle formed by the Sun-Earth-Moon when the Moon was at perigee was the same every month? No. It means that one Earth year after the Moon was at perigee, the Moon would ...
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• 451

### At what point are orbital resonances no longer "ordered" but "chaotic?"

I don't think you are correct. If the resonance can be calculated exactly, then it's a resonance. Chaotic orbits cannot be calculated exactly, as they depend critically on initial conditions. ...
• 3,637