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Saturn's Gallic group of satellites

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The Gallic group is a dynamical grouping of the prograde irregular satellites of Saturn following similar orbits.
300px-TheIrregulars SATURN.svg-1-

Irregular satellites of Saturn

Their semi-major axes range between 16 and 19 Gm, their inclinations between 35° and 40°, and their eccentricities around 0.53.

The group is very homogenous, all satellites displaying light-red colour (colour indices B − V = 0.91 and V − R = 0.48). The limited dispersion of the orbital parameters and the spectral homogeneity are consistent with a common origin in the break-up of a single object[1].

The diagram illustrates the Gallic group in relation to other irregular satellites of Saturn. The eccentricity of the orbits is represented by the yellow segments (extending from the pericentre to the apocentre) with the inclination represented on Y axis.

The three members of the group are (in order of increasing distance from Saturn):

The International Astronomical Union (IAU) reserves names taken from Gallic mythology for these moons.

References

  1. Grav, Tommy; Holman, Matthew J.; Gladman, Brett J.; Aksnes, Kaare Photometric survey of the irregular satellites, Icarus, 166,(2003), pp. 33-45. Preprint


Saturn (satellites)
Janus' group | Mimas | Enceladus | Tethys | Dione | Rhea | Titan | Hyperion | Iapetus | Inuit group | Gallic group | Norse group
See also: Pronunciation key | Rings of Saturn

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