Proper Name | Naiad | Designation | Neptune III | Primary Planet | Neptune | Orbital Period | 7 hours, 22 minutes | Distance from Neptune | Semi-Major Axis: 48,227 km Periapsis: 48,213 km Apoapsis: 48,241 km | Eccentricity | 0.0003 | Rotation Period | 7 hours, 22 minutes (synchronous orbit) | Mean Diameter | 66 km 42 miles | Notes | Neptune's innermost moon, Naiad is a small body with a highly elongated shape, and its longest axis approaches 100km in length. It is named for a type of spirit from Greek mythology associated with springs, wells and other small bodies of water. |
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