Daphnis (moon)
Daphnis is an inner satellite of Saturn. It is also known as Saturn XXXV; its provisional designation was S/2005 S 1. Daphnis is about 8 kilometers in diameter, and orbits the planet in the Keeler Gap within the A ring.
Cassini probe image of Daphnis surrounded by Saturn's rings (2017) | |
| Discovery | |
|---|---|
| Discovered by | Cassini Imaging Science Team |
| Discovery date | May 1, 2005 |
| Designations | |
Designation | Saturn XXXV |
| Pronunciation | /ˈdæfnəs/ |
Named after | Δάφνις Daphnis |
Alternative names | S/2005 S 1 |
| Adjectives | Daphnidian /dæfˈnɪdiən/ |
| Orbital characteristics | |
Semi-major axis | 136505.5±0.1 km |
| Eccentricity | 0.0000331±0.0000062 |
Orbital period (sidereal) | 0.5940798 d (14.257915 h) |
| Inclination | 0.0036°±0.0013° |
| Satellite of | Saturn |
| Group | Shepherd moon of the Keeler Gap |
| Physical characteristics | |
| Dimensions | 9.8 × 8.4 × 5.6 km (± 0.6 × 1.6 × 1.2 km): 2 |
Mean diameter | 7.8±1.0 km: 2 |
| Volume | 248 km3 |
| Mass | (6.8±1.7)×1013 kg: 3 |
Mean density | 0.276±0.144 g/cm3: 3 |
Surface gravity | 0.0002 m/s2 at longest axis to 0.0006 m/s2 at poles |
| 0.001 km/s at longest axis to 0.002 km/s at poles | |
Synodic rotation period | synchronous |
| unknown | |
| Albedo | ≈ 0.5 |
| Temperature | ≈ 78 K |
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