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Irregular moon
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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 or all of the following ways: distant; inclined
Irregular satellites of Jupiter (red), Saturn (green), Uranus (magenta) and Neptune (blue) (including Triton at the top left). The horizontal axis sho
Irregular satellites of Jupiter (red), Saturn (green), Uranus (magenta) and Neptune (blue) (including Triton at the top left). The horizontal axis shows their distance from the planet (semi-major axis) expressed as a fraction of the planet's Hill sphere's radius. The vertical axis shows their orbital inclination. Points or circles represent their relative sizes. Data as of February 2024.
Phoebe cassini full
Phoebe cassini full
Jupiter family
Jupiter family
243 ida crop
243 ida crop
Triton (moon)
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Triton is the largest natural satellite of the planet Neptune. It is the only moon of Neptune massive enough to be rounded under its own gravity and hosts a thin, hazy atmosphere. Triton orbits Neptun
Irregular moon
…a stable orbit, unlike temporary satellites which often have similarly irregular orbits but will eventually depart. The term does not refer to shape; Triton, for example, is a round moon but is considered irregular due to its orbit and origins. Given their great distances from their parent planet, the term…
William Lassell, the discoverer of Triton
William Lassell, the discoverer of Triton
Clouds observed above Triton's limb by Voyager 2
Clouds observed above Triton's limb by Voyager 2
Dark streaks across Triton's south polar cap surface, thought to be dust deposits left by eruptions of nitrogen geysers
Dark streaks across Triton's south polar cap surface, thought to be dust deposits left by eruptions of nitrogen geysers
Two large cryolava lakes on Triton, seen west of Leviathan Patera. Combined, they are nearly the size of Kraken Mare on Titan. These features are unus
Two large cryolava lakes on Triton, seen west of Leviathan Patera. Combined, they are nearly the size of Kraken Mare on Titan. These features are unusually crater free, indicating they are young and were recently molten.