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1 References  














Geirrod (moon)






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Geirrod
Discovery[1]
Discovered bySheppard et al.
Discovery date2019
Designations

Named after

Geirröðr

Alternative names

Saturn LXVI
S/2004 S 38
S8568a[2]
Orbital characteristics[2]

Semi-major axis

23006200 km
Eccentricity0.381

Orbital period (sidereal)

−1295.8 days
Inclination155.0°
Satellite ofSaturn
GroupNorse group
Physical characteristics

Mean diameter

4+50%
−30%
 km

Apparent magnitude

25.1

Geirrod (Saturn LXVI), provisionally known as S/2004 S 38, is a natural satelliteofSaturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, and Jan Kleyna on October 8, 2019 from observations taken between December 12, 2004 and March 22, 2007.[3] It was given its permanent designation in August 2021.[4] On 24 August 2022, it was officially named after Geirröðr, a jötunn from Norse mythology.[5] He is an enemy of Thor and is killed by him.[6]

Geirrod is about 4 kilometres in diameter, and orbits Saturn at an average distance of 21.908 Gm in 1,211.02 days, at an inclination of 154° to the ecliptic, in a retrograde direction and with an eccentricity of 0.437.[3]

References

[edit]
  • ^ a b "MPEC 2019-T160 : S/2004 S 38". minorplanetcenter.net. Retrieved 8 October 2019.
  • ^ "M.P.C. 133821" (PDF). Minor Planet Center. International Astronomical Union. 10 August 2021. Retrieved 21 August 2021.
  • ^ "Names Approved for 10 Small Satellites of Saturn". usgs.gov. USGS. 24 August 2022. Retrieved 30 August 2022.
  • ^ Lindow, John (2002). Norse Mythology: A Guide to Gods, Heroes, Rituals, and Beliefs. Oxford University Press. p. 138. ISBN 978-0-19-983969-8.

  • Retrieved from "https://en.wikipedia.org/w/index.php?title=Geirrod_(moon)&oldid=1211274421"

    Categories: 
    Norse group
    Irregular satellites
    Moons of Saturn
    Discoveries by Scott S. Sheppard
    Astronomical objects discovered in 2019
    Moons with a retrograde orbit
    Hidden categories: 
    Articles with short description
    Short description matches Wikidata
     



    This page was last edited on 1 March 2024, at 18:53 (UTC).

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