Narvi (moon)

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Narvi's discovery image
Discovered byScott S. Sheppard et al.
Discovery date11 April 2003
S/2003 S 1
Orbital characteristics[1]
19226600 km
−995.33 days
Satellite ofSaturn
GroupNorse group
Physical characteristics
Mean diameter
10.21±0.02 h[2]

Narvi /ˈnɑːrvi/ or Saturn XXXI is a natural satellite of Saturn. It was discovered by a team of astronomers led by Scott S. Sheppard in 2003, and given the temporary designation S/2003 S 1.


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 136.8° to the ecliptic (109° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.2990, very similar to Bestla's orbit.[3] Narvi's rotation period is 10.21±0.02 hours, and its light curve has three minima like Siarnaq and Ymir. Unlike the other triangular moons, however, one minimum is much higher than the others, and the maximum that is a half-period ahead is much lower.[2]


It was named in January 2005 after Narfi, a giant in Norse mythology. The name was approved by the IAU Working Group on Planetary System Nomenclature on 21 January 2005.


  1. ^ S.S. Sheppard (2019), Moons of Saturn, Carnegie Science, on line
  2. ^ a b c Denk, T.; Mottola, S. (2019). Cassini Observations of Saturn's Irregular Moons (PDF). 50th Lunar and Planetary Science Conference. Lunar and Planetary Institute.
  3. ^ Denk, T.; Mottola, S.; Bottke, W. F.; Hamilton, D. P. (2018). "The Irregular Satellites of Saturn". Enceladus and the Icy Moons of Saturn (PDF). Vol. 322. University of Arizona Press. pp. 409–434. doi:10.2458/azu_uapress_9780816537075-ch020. ISBN 9780816537488.

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