Angrboda (Saturn LV), provisionally known as S/2004 S 22, is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, and Jan Kleyna on October 7, 2019 from observations taken between December 12, 2004 and February 1, 2006.[3] It was given its permanent designation in August 2021.[4] On 24 August 2022, it was officially named after Angrboða, a jötunn in Norse mythology.[5] She is the consort of Loki and the mother of the wolf Fenrir, the Midgard serpent Jörmungandr, and the ruler of the dead Hel.[6]
| Discovery[1] | |
|---|---|
| Discovered by | Sheppard et al. |
| Discovery date | 2019 |
| Designations | |
Named after | Angrboða |
| Saturn LV S/2004 S 22 S8637a[2] | |
| Orbital characteristics[2] | |
| 20379900 km | |
| Eccentricity | 0.257 |
| −1080.4 days | |
| Inclination | 177.4° |
| Satellite of | Saturn |
| Group | Norse group |
| Physical characteristics | |
| 3+50% −30% km | |
| 25.3 | |
Angrboda is about 3 kilometres in diameter, and orbits Saturn at an average distance of 20.636 Gm in 1107.13 days, at an inclination of 177° to the ecliptic, in a retrograde direction and with an eccentricity of 0.251.[3]
References
edit- ^ Discovery Circumstances from JPL
- ^ a b S.S. Sheppard (2019), Moons of Saturn, Carnegie Science, on line
- ^ a b "MPEC 2019-T128 : S/2004 S 22". minorplanetcenter.net. Retrieved 7 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. 59. ISBN 978-0-19-983969-8.