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Questions tagged [orbital-resonance]

Questions regarding the phenomena by which the ratio of the orbital periods of two (or more) bodies is a fraction of small integers, because of the gravitational interactions between them.

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Could a planet or its moon be synchronously tidally locked with the sun, but still in orbit with its moon/planet?

Obviously, with so many stars and presumable planets, lots of things can happen for a short time, but I'm wondering if there is a stable configuration for either twin planets or a planet with a ...
user121330's user avatar
8 votes
1 answer
313 views

Orbital resonance and the precession of the periapsis

I was reading up on orbital resonance and came across something on Wikipedia stating that the 1:2 orbital resonance of Io-Europa is "imperfect". I mean that when you simply take the period ...
DanceroftheStars's user avatar
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144 views

Just how resonant is the "resonant sextuplet of sub-Neptunes transiting the bright star HD 110067"?

The November 29, 2023 arXiv preprint A resonant sextuplet of sub-Neptunes transiting the bright star HD 110067 constructs a resonant chain of orbital periods based on mean motion resonances (MMRs) and ...
uhoh's user avatar
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2 votes
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Is there an orbit around the earth that experiences a total solar eclipse by the Moon at least every month?

Is there a way to design an earth orbit so that it passes through the Moon's umbra with greater frequency than total solar eclipses occur on earth's surface? What is the maximum frequency of eclipses ...
vwoods's user avatar
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Will tidal heating on Jovian moons ever cease?

Will tidal heating on Jupiter's Galilean moons, specifically Io & Europa ever cease? I thought not, since they are occasionally in orbital resonance with each other and Ganymede, thus preventing ...
ant888nsmb2's user avatar
3 votes
1 answer
178 views

Is it still called an orbital resonance if the ratio is irrational?

Previously, I asked At what point are orbital resonances no longer "ordered" but "chaotic?", and received an answer from @CarlWitthoft: Perhaps if the calculated fraction had an ...
WarpPrime's user avatar
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8 votes
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At what point are orbital resonances no longer "ordered" but "chaotic?"

Orbital resonances are typically in small valued integer ratios, like 2:1, 3:2, or 4:7. However, there are some resonances whose ratios have large reduced values, including the 73:69 Naiad:Thalassa ...
WarpPrime's user avatar
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Why are triple conjunctions in a resonance forbidden?

I was reading the Wikipedia article about orbital resonance and noticed that Laplace resonances forbid triple conjunctions. This seems to be supported by the Io-Europa-Ganymede system and the Nyx-Styx-...
WarpPrime's user avatar
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2 votes
1 answer
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Relative orientation in a 1:1 resonance of a planet and a satellite

To my understanding, in a two-body problem of a planet and a satellite, a 1:1 resonance means that the orbital period of the satellite is the same as its angular frequency (maybe not, so please ...
ValientProcess's user avatar
4 votes
1 answer
167 views

Is it possible to have a positive rational number of months (more than 1) in a year?

It is possible for a planet to have orbital resonance with a sun (e.g. Mercury has a 3:2 spin resonance with the sun). It is also possible for a moon to have orbital resonance with a planet (e.g. our ...
Daniel-耶稣活着's user avatar
3 votes
1 answer
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Where can I build my house on Mercury so that I can see double sunsets (and sunrises)? Can I do it near the poles where it's cooler?

CNN'S Mercury mission flies by closest planet to the sun for the first time says at the end: Mercury's unusual rotation and oval-shaped orbit around the sun (sic) means our star seems to quickly rise,...
uhoh's user avatar
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2 votes
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Are there other possible Laplace resonances? (e.g. 1:3:9)

Three of Jupiter's moons (Io, Europa and Ganymede) are in a 1:2:4 Laplace resonance. Are there other possible resonances for a set of planets or moons, such as 1:3:9 or 1:4:16 that are stable?
Ingolifs's user avatar
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How to determine how often a planet's center will be collinear with its moon's?

Expanding on the question: Let's say I have a planet orbiting some star (earth-like, sun-like, for the sake of example). If this planet has two moons, M1 with orbital period of 30 earth-days and M2 ...
PedroGaya's user avatar
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Orbital resonance 2:1

I considered the motion of an asteroid around the sun, in a $2:1$ orbital resonance with Jupiter. Following the study of this resonance, it was observed that the angle between the major axis of the ...
Augustin's user avatar
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1 answer
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Orbital resonance - basic aspects

In the following lines, I will ask you some questions regarding the notion of orbital resonance. I know that the orbital resonance of two celestial body represents the driving of a dynamical system by ...
Augustin's user avatar
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1 answer
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Orbital resonances - expansion of disturbing function

I want to study the orbital resonance type 3:1 between an asteroid and Jupiter. For this purpose, I found the expansion of the disturbing function, $R$, in Celletti A., Stability and Chaos in ...
Augustin's user avatar
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2 answers
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What exactly was the Moon's "Evection Resonance"?

Ward et. al define the evection resonance of the Moon with the Earth and Sun as: occurring when the lunar perigee precession period equals one year. Does this simply mean that the angle formed by ...
Connor Garcia's user avatar
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1 vote
1 answer
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How to choose initial state vectors for a resonant orbit numerical simulation?

How do higher numbers affect orbital resonance? is a really interesting question, and I thought I would try to do a simple numerical simulation of various resonance ratios to see if some are ...
uhoh's user avatar
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4 votes
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How do higher numbers affect orbital resonance?

When talking about orbital resonance, the most common resonances in our Solar System are 1:2 (think Jupiter's moons) and 2:3 (think Pluto and Neptune). However, the lack of larger numbers within these ...
Nip Dip's user avatar
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How can orbital resonance sometimes have a stabilising effect, whilst other times, it has a destabilising effect?

I have just started learning about orbital resonance. I understand how bodies in orbital resonance will line up according to the orbital ratio number, and there will be increased gravitational effects ...
Matthew H's user avatar
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How can I calculate how long time a Galilean moon orbital configuration will take to repeat again?

For illustrative purposes, if I assume that the Galilean moons, Io, Europa, Ganymede, and Callisto, have coplanar circular orbits, and their initial configuration are, respectively: 10, 20, 30, and 40 ...
RBN Bat's user avatar
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3 votes
1 answer
140 views

Why does the exoplanetary system TOI-178 challenges current theories of planet formation?

I am excited reading the news about ESA's latest exoplanet discovery using CHEOPS. The system TOI-178 consists of (at least?) five planets, following a 18:9:6:4:3 pattern. In the press release, the ...
B--rian's user avatar
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9 votes
1 answer
207 views

Mercury's spin-orbit resonance

When was it confirmed that Mercury has a 3:2 spin-orbit resonance and by whom (research group/radio observations...)? The first suggestion was made by Giuseppe Colombo in 1965. Its proximity to the ...
theWrongAlice's user avatar
6 votes
1 answer
632 views

When will Callisto be in orbital resonance with the rest of Jupiter's big moons?

The four Gallilean moons of Jupiter (from innermost) are Io, Europa, Ganymede, and Callisto. Io, Europa, and Ganymede are in a 1:2:4 orbital resonance. Callisto's orbital period is 16.689 days, which ...
Connor Garcia's user avatar
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7 votes
2 answers
155 views

Could a Trappist-like planetary system exist around a sun like ours?

So, a couple of years ago, the TRAPPIST sun was discovered to have 7 different earth-like planets orbiting it – three of them in the habitable zone. Nothing like this has ever been seen before, or ...
Atlan's user avatar
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1 vote
1 answer
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Hypothetical planet jump: Will it perturb star systems?

In a more speculative corner of SE somebody was dreaming up a story of planets traveling between star systems through wormholes. I was wondering how much the appearing/disappearing of a planet the ...
Peter - Reinstate Monica's user avatar
3 votes
2 answers
278 views

Is this a potential planetary setup for the Alpha Centauri System?

I originally posted this on the World Building SE, but I was suggested to post it here for a better answer. I am attempting to create a [semi]plausible star system in Alpha Centauri for a series. The ...
Markitect's user avatar
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5 votes
1 answer
273 views

Explanation about the resonance, mean motion resonance and libration

I am studying for a project the dynamics of multi-planetary system in resonance. I have two questions about this domain. In many articles they speak about 'mean motion resonance', what is the ...
Adrien Chimay's user avatar
19 votes
3 answers
639 views

Why are asteroids with zero orbital inclination rare?

This is a plot of orbital inclination ($i_p$) vs. semi-major axis ($a_p$) of 96944 asteroids in the Main Belt, done by Piotr Deuar. Some structure can be seen in this diagram; clumps are asteroidal ...
Swike's user avatar
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5 votes
0 answers
82 views

Can mean motion resonances make orbits more unstable rather than more stable?

This paper on closely packed orbit simulation seems to suggest that having the planets in first and second order resonances decreases the time till orbits cross each other. I'd got the impression that ...
Axion's user avatar
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1 vote
0 answers
123 views

What exactly is the relationship between the orbits of Neptune's moons Naiad and Thalassa?

Scitechdaily's Wild Orbits of Neptune Moons a ‘Dance of Avoidance’ [Video] links to the YouTube video Neptune Moon Dance (Naiad and Thalassa) and says: In this perpetual choreography, Naiad swirls ...
uhoh's user avatar
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2 votes
0 answers
70 views

Orbital Resonance

First, let me verify that this statement is correct: Planets will tend to migrate toward stable orbital resonances with other planets around the host star. There are unstable resonances, also, where ...
Jack R. Woods's user avatar
1 vote
1 answer
178 views

What exactly are the "ν6 secular Sun-Jupiter-Saturn" and the "1:4 Sun-Jupiter" resonances?

In the recent Acta Astronautica article The edge of space: Revisiting the Karman Line, Harvard-Smithsonian Center for Astrophysics astronomer, Space SE contributor and "inverse namesake" of asteroid (...
uhoh's user avatar
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5 votes
1 answer
918 views

Explanation of resonance stability and instability

I'm having some trouble grasping the idea of planetary resonances due to what seems to me like an ambiguity. It is known that the asteroid main belt is sculpted by the Kirkwood gaps, corresponding to ...
mysterium's user avatar
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6 votes
1 answer
150 views

1:1 resonance of two planets around a star in close proximity - approximate perturbative mathematical treatments?

This question is primarily about the mathematics of orbital mechanics. The circular restricted 3 body problem (in 3 dimensions) assumes two massive bodies in circular orbits around their center of ...
uhoh's user avatar
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4 votes
4 answers
259 views

Can a solar system exist where the second planet rotates fast, and the third planet is tidally locked to their star?

Today I read about the Romulan home star system and it looks like it might be impossible for such a star system to exist. Memory Alpha describes Remus: Remus was tidally locked, with one ...
M.A. Golding's user avatar
7 votes
2 answers
444 views

Just how "locked" are resonant-chains of exoplanets thought to be? (e.g. K2-138 and TOI-178)

The Phys.org news item Discovery of new planet reveals distant solar system to rival our own outlines the recent announcement of results using AI to help search Kepler photometric (transit-method) ...
uhoh's user avatar
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9 votes
2 answers
1k views

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

A recent paper in Nature "Planetary science: Reckless orbiting in the Solar System" (Morais & Namouni, 2017) presents the following series of four co-orbital states: While I understand ...
msanford's user avatar
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-3 votes
1 answer
135 views

Is this a stable system? [closed]

Just messing around and was wondering how stable a system like this would be.
Althaen's user avatar
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5 votes
1 answer
495 views

Planetary orbital resonances

The Kirkwood gaps in the asteroid belt are associated with orbital resonances with Jupiter yet planets seem to prefer resonant locations. Why don't asteroids accumulate near the "Kirkwood ...
Jack R. Woods's user avatar
7 votes
1 answer
346 views

Orbital eccentricity variation of the other planets?

On Earth, it's fairly well published, mostly in climate change related articles, that the Earth's orbital eccentricity operates on a 413,000 year cycle with roughly 90,000–125,000 year variation ...
userLTK's user avatar
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5 votes
2 answers
151 views

Terminology: Is there a name for the points on the surfaces of tidally locked parent/satellite bodies that always face each other?

This is purely a question about terminology, one that has eluded my googling efforts. When a satellite and its parent body are tidally locked to each other, there is (in an ideal case) a single ...
Brionius's user avatar
  • 341
8 votes
1 answer
1k views

Stability of orbital resonance

Recently I've become more interested in the topic of the stability of planetary systems. I have been reading about it and it seems that orbital resonances play an important role in the stability of ...
Javier's user avatar
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3 votes
1 answer
270 views

Do orbital resonances always form naturally?

For example, if I throw two planets to orbit a star at random direction, would they form an orbital resonance?
Gstestso's user avatar
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