S/2004 S 21 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 January 17, 2007.[3]
| Discovery[1] | |
|---|---|
| Discovered by | Sheppard et al. |
| Discovery date | 2019 |
| Designations | |
| S5602a[2] | |
| Orbital characteristics[2] | |
| 23810400 km | |
| Eccentricity | 0.312 |
| −1365.1 days | |
| Inclination | 154.6° |
| Satellite of | Saturn |
| Group | Norse group |
| Physical characteristics | |
| 3 km | |
| 25.4 | |
S/2004 S 21 is about 3 kilometres in diameter, and orbits Saturn at an average distance of 22.645 Gm in 1272.61 days, at an inclination of 160° to the ecliptic, in a retrograde direction and with an eccentricity of 0.318.[3]
References
edit- ^ Discovery Circumstances from JPL
- ^ a b S.S. Sheppard (2019). "Moons of Saturn, Carnegie Science, on line".
- ^ a b "MPEC 2019-T127 : S/2004 S 21". minorplanetcenter.net. Retrieved 7 October 2019.