| Proper Name | Fenrir | | Designation | Saturn XLI | | Primary Planet | Saturn | | Family / Class | Norse Group | | Orbital Period | 3 years, 164 days, 8 hours | | Distance from Saturn | Semi-Major Axis: 22,454,000 km (0.15 AU)
Periapsis: 19,423,000 km (0.13 AU)
Apoapsis: 25,485,000 km (0.17 AU) | | Eccentricity | 0.1363 | | Rotation Period | Not known | | Diameter (longest axis) | 4 km
2.5 miles
(highly uncertain) | | Notes | The small, dark moon Fenrir is part of a group of some fifty irregular moons orbiting in the outer regions of the Saturn system, known collectively as the Norse group. Like the other members of the group, Fenrir has a retrograde orbit, and thus is likely to be an object captured by Saturn's gravity, rather than having formed within the Saturnian system. |
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