Erriapo (air'-ee-ap'-oe?, Latin Erriapō or Erriappō) (Saturn XXVIII) is a natural satellite of Saturn. It was discovered by John J. Kavelaars, et al. in 2000, and given the temporary designation S/2000 S 10. Erriapo is about 8.6 kilometres in diameter, and orbits Saturn at an average distance of 17,409 Mm in 857.556 days, at an inclination of 38° to the ecliptic (24° to Saturn's equator), and with an eccentricity of 0.534. The common noun moon (not capitalized) is used to mean any natural satellite of the other planets. ... Atmospheric characteristics Atmospheric pressure 140 kPa Hydrogen >93% Helium >5% Methane 0. ... JJ Kavelaars is a Canadian astronomer who was part of a team that discovered several moons of Saturn, Uranus, and Neptune. ... 2000 is a leap year starting on Saturday of the Gregorian calendar. ... Inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit and is the angular distance of the orbital plane from the plane of the reference (usually planets equator or the ecliptic), stated in degrees. ... The plane of the Ecliptic is well seen in this picture from the 1994 lunar prospecting Clementine spacecraft. ... (This page refers to eccitricity in astrodynamics. ...
Several moons are thought to be captured asteroids; others may be fragments of larger moons shattered by impacts, or (in the case of Earth's Moon) a portion of the planet itself blasted into orbit by a large impact.
Most major moons in the solar system are tidally locked to their primaries, meaning that one side of the moon is always turned toward the planet.
Exceptions are Saturn'smoonHyperion, which rotates chaotically due to a variety of external influences, and the outermost moons of the gas giants, which are too far away to become 'locked' (an example is Saturn'smoonPhoebe).
Calypso (kə-lip'-soe, IPA /kəˈlɪpso/, Greek Καλυψώ) is a moon of Saturn.
The moonTelesto resides in Tethys' leading Lagrangian point, 60 degrees ahead of Tethys.
Like many other small Saturnian moons and small asteroids it is irregularly shaped by overlapping large craters and appears to also have loose surface material capable of smoothing the appearance of craters.
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