| Discovery | |
|---|---|
| Discovered by | S. Sheppard, D. Jewitt, J. Kleyna, and B. Marsden |
| Discovery date | May 4, 2005 |
| Designations | |
Designation | Saturn XXXVI |
| Pronunciation | /ˈaɪjɪər, ˈæɡɪər/ etc. |
Named after | Ægir |
| S/2004 S 10 | |
| Orbital characteristics[1] | |
| 20735000 km | |
| Eccentricity | 0.252 |
| 1025.908 d | |
| Inclination | 166.7° |
| Satellite of | Saturn |
| Group | Norse group |
| Physical characteristics[2] | |
| 4 km | |
| Albedo | 0.06 (assumed) |
Spectral type | B–R = 1.30 ± 0.06[3] |
| 24.4 | |
| 15.5 | |
Aegir, also Saturn XXXVI (provisional designation S/2004 S 10), is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on May 4, 2005, from observations taken between December 12, 2004, and March 11, 2005.
Aegir is about 4 kilometres in diameter, and orbits Saturn at an average distance of 19,618 Mm in 1025.908 days, at an inclination of 167° to the ecliptic (140° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.237.