Erriapus, about 12 km Mount Everest, height, 8.8 km DRAWN TO THE SAME SCALE

Size comparison drawn by Go Astronomy from the moons dataset.

Moon of Saturn · Gallic group

Erriapus

Erriapus is a small moon of Saturn, about 12 km across, orbiting 17.5 million km from Saturn once every 2.4 years.

Erriapus in brief

Diameter
12 km
Distance from Saturn
17.5 million km
Orbit
2.4 years
Discovered
2000
Magnitude
22.8
To see it
not visible in amateur telescopes

Erriapus is a 12-km irregular moon that orbits Saturn every 2.4 years

Erriapus is a small moon of Saturn, about 12 km across, orbiting 17.5 million km from Saturn once every 2.4 years. It belongs to the Gallic group, irregular moons on forward orbits about 16 to 19 million km from Saturn, named after figures of Gallic mythology. Its orbit is strongly stretched, with an eccentricity of 0.475, so its distance from Saturn changes by a large factor each orbit. The orbit is tilted 37.1° to the planet's orbit. It was discovered in 2000 by Gladman et al. Its provisional designation was S/2000 S 10.

Erriapus is beyond the reach of backyard telescopes

At magnitude 22.8, Erriapus is far too faint for amateur telescopes; it was found with some of the largest telescopes on Earth.

Erriapus and its neighbors around Saturn

TitanRheaIapetusErriapus
Erriapus orbits 17.5 million km from Saturn, ranging from 9.2 million km to 25.8 million km, in the same direction the planet spins: counterclockwise, seen from above its north pole. The arrow shows the direction. Distances use a log scale so the inner and outer moons fit; dots are the irregular moons, orange ones orbiting backwards.
The Gallic group, by distance from Saturn
MoonDiameterDistanceOrbit
S/2007 S 84 km17.0 million km2.3 years
S/2004 S 295 km17.1 million km2.3 years
S/2019 S 293 km17.4 million km2.3 years
S/2023 S 183 km17.4 million km2.3 years
S/2023 S 173 km17.4 million km2.3 years
S/2007 S 114 km17.4 million km2.4 years
S/2023 S 543 km17.5 million km2.4 years
Erriapus12 km17.5 million km2.4 years
S/2019 S 313 km17.7 million km2.4 years
Tarvos16 km18.2 million km2.5 years
S/2020 S 43 km18.2 million km2.5 years
S/2019 S 343 km18.4 million km2.6 years
S/2005 S 73 km18.5 million km2.6 years
S/2006 S 124 km19.6 million km2.8 years
S/2004 S 243 km23.3 million km3.6 years
4 more in this group: see all

Erriapus physical and orbital data

Every value in the moons dataset for Erriapus
ParentSaturn
GroupGallic
DesignationS/2000 S 10
Diameter12 km
Distance from planet1.75069e+07 km
Orbital period864.9236 days
Inclination37.1 °
Eccentricity0.475
Retrograde orbitno
Magnitude22.8
Discovered2000
DiscovererGladman et al.

From the site's moons dataset (moons_q426), which follows JPL's satellite tables and lists a source for every row.