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In astronomy, an irregular moon, irregular satellite, or irregular natural satellite is a natural satellite following an orbit that is irregular in some of the following ways: Distant; inclined; highly elliptical; retrograde. They have often been captured by their parent planet, unlike regular satellites formed in orbit around them.
Namaka is the smaller, inner moon of the trans-Neptunian dwarf planet Haumea.Discovered in 2005, it is named after Nāmaka, the goddess of the sea in Hawaiian mythology and one of the daughters of Haumea.
Thus, near-circular, highly inclined orbits can become very eccentric. Since increasing eccentricity while keeping the semimajor axis constant reduces the distance between the objects at periapsis, this mechanism can cause comets (perturbed by Jupiter) to become sungrazing. Lidov–Kozai oscillations will be present if L z is lower than a ...
S/2021 N 1 is an irregular moon of Neptune, since it has a distant, highly elliptical, and highly inclined orbit. Irregular moons are loosely bound by Neptune's gravity because of their great distance from the planet, so their orbits are frequently perturbed by the gravity of the Sun and other planets.
In astronomy, perturbation is the complex motion of a massive body subjected to forces other than the gravitational attraction of a single other massive body. [1] The other forces can include a third (fourth, fifth, etc.) body, resistance, as from an atmosphere, and the off-center attraction of an oblate or otherwise misshapen body.
The perturbed wavefront may be related at any given instant to the original planar wavefront () in the following way: = (() ()) where () represents the fractional change in wavefront amplitude and () is the change in wavefront phase introduced by the atmosphere.
While a new year starts a new performance clock for CEOs, four heads of iconic U.S. enterprises face turbulent, inherited challenges with elevated investor anxiety. These four Fortune 500 ...
This is a list of collisions between exoplanets or planetesimals observed in extrasolar systems.These collisions are more common in young systems and are an important part in the growth of especially terrestrial planets from so-called planetary embryos. [1]