&sq=Envato&lang=en&file=File:PIA09813_Epimetheus_S._polar_region.jpg) South pole of Epimetheus imaged by Cassini on 3 December 2007 | |
| Discovery | |
|---|---|
| Discovered by | Richard Walker |
| Discovery date | 18 December 1966 |
| Designations | |
Designation | Saturn XI |
| Pronunciation | /ɛpəˈmiːθiːəs/[1] |
Named after | Ἐπιμηθεύς Epimētheus |
| Adjectives | Epimethean /ɛpəˈmiːθiːən/[2] |
| Orbital characteristics [3] | |
| Epoch 31 December 2003 (JD 2453005.5) | |
| 151410±10 km | |
| Eccentricity | 0.0098 |
| 0.694333517 d | |
| Inclination | 0.351°±0.004° to Saturn's equator |
| Satellite of | Saturn |
| Group | Co-orbital with Janus |
| Physical characteristics | |
| Dimensions | 129.6 × 116.2 × 107.0 km (± 0.6 × 0.4 × 0.4 km)[4]: 2 |
| 117.2±0.6 km[4]: 2 | |
| Volume | 843290±2000 km3[5]: 4 |
| Mass | (5.25607±0.00081)×1017 kg[a] |
Mean density | 0.6233±0.0015 g/cm3[5]: 4 |
| 0.0066–0.0109 m/s2[4]: 3 | |
| 0.033 km/s at longest axis to 0.036 km/s at poles | |
| synchronous | |
| zero | |
| Albedo | 0.73±0.03 (geometric) [6] |
| Temperature | ≈ 78 K |
Epimetheus /ɛpəˈmiːθiːəs/ is an inner satellite of Saturn. It is also known as Saturn XI. It is named after the mythological Epimetheus, brother of Prometheus.
- ^ Epimetheus. Charlton T. Lewis and Charles Short. A Latin Dictionary on Perseus Project.
- ^ NASA (2005 March 28) Epimethean Profile
- ^ Spitale Jacobson et al. 2006.
- ^ a b c Thomas & Helfenstein 2020.
- ^ a b c Lainey et al. 2023.
- ^ Verbiscer French et al. 2007.
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