Narvi is about 7 kilometres in diameter, and orbits Saturn at an average distance of 19,371,000 km in 1006.541 days, at an inclination of 137° to the ecliptic (109° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.320.
- IAU Working Group for Planetary System Nomenclature
- IAUC 8116: Satellites of Jupiter and Saturn April 11, 2003 (discovery)
- MPEC 2003-G39: S/2003 S 1 April 8, 2003 (discovery and ephemeris)
- IAUC 8471: Satellites of Saturn January 21, 2005 (naming the moon)