Narvi (moon)

Narvi

Narvi's discovery image
Discovery
Discovered by	Scott S. Sheppard et al.
Discovery date	11 April 2003
Designations
Pronunciation	/ˈnɑːrvi/
Named after	Narfi
Alternative names	S/2003 S 1
Orbital characteristics[1]
Semi-major axis	19226600 km
Eccentricity	0.2990
Orbital period (sidereal)	−995.33 days
Inclination	136.803°
Satellite of	Saturn
Group	Norse group
Physical characteristics[2]
Mean radius	3.5+50% −30% km
Synodic rotation period	10.21±0.02 h
Albedo	0.06 (assumed)
Spectral type	g – r = 0.24 ± 0.07, r – i = 0.42 ± 0.09[3]
Apparent magnitude	23.8

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.

Description

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.^[4] 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]

Naming

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.

References

1. S.S. Sheppard (2019), Moons of Saturn, Carnegie Science, on line
2. Denk, T.; Mottola, S. (2019). Cassini Observations of Saturn's Irregular Moons (PDF). 50th Lunar and Planetary Science Conference. Lunar and Planetary Institute.
3. Peña, José; Fuentes, Cesar (2022-05-17). "Colors of Irregular Satellites of Saturn with the Dark Energy Camera". The Astronomical Journal. 163 (6): 274. arXiv:2204.08391. Bibcode:2022AJ....163..274P. doi:10.3847/1538-3881/ac6258. ISSN 1538-3881.
4. 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. Bibcode:2018eims.book..409D. doi:10.2458/azu_uapress_9780816537075-ch020. ISBN 9780816537488.

External links

• IAU Working Group for Planetary System Nomenclature
• IAUC 8116: Satellites of Jupiter and Saturn Archived 2006-05-05 at the Wayback Machine 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)