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Hyperion /haɪˈpɪəriən/ is the eighth-largest moon of Saturn. It is distinguished by its highly irregular shape, chaotic rotation, low density, and unusual sponge-like appearance. It was the first non-rounded moon to be discovered.
Characters, Physical characteristics & Orbit and rotation
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| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Hyperion (moon) | Adjectives | Hyperionian /ˌhɪpəraɪˈoʊniən/ | 1.00 | infobox |
| Hyperion (moon) | Albedo | 0.33 ± 0.05 (bolometric) | 1.00 | infobox |
| Hyperion (moon) | Apparent magnitude | 14.1 | 1.00 | infobox |
| Hyperion (moon) | Axial tilt | variable | 1.00 | infobox |
| Hyperion (moon) | Designation | Saturn VII | 1.00 | infobox |
| Hyperion (moon) | Dimensions | 361.8 × 258.0 × 204.0 ± 0.2 km | 1.00 | infobox |
| Hyperion (moon) | Discovered by | William Bond | 1.00 | infobox |
| Hyperion (moon) | Discovered by | George Bond | 1.00 | infobox |
| Hyperion (moon) | Discovered by | William Lassell | 1.00 | infobox |
| Hyperion (moon) | Discovery date | 16 September 1848 | 1.00 | infobox |
| Hyperion (moon) | Eccentricity | 0.105 | 1.00 | infobox |
| Hyperion (moon) | Escape velocity | 45–99 m/s (depending on location) | 1.00 | infobox |
| Hyperion (moon) | Flattening | 0.287 | 1.00 | infobox |
| Hyperion (moon) | Inclination | 0.6° (to the Laplace plane) | 1.00 | infobox |
| Hyperion (moon) | K | 58 ± 2 | 1.00 | infobox |
| Hyperion (moon) | Mass | (5.5510±0.0007)×1018 kg | 1.00 | infobox |
| Hyperion (moon) | Mean density | 0.563±0.002 g/cm3 | 1.00 | infobox |
| Hyperion (moon) | Mean radius | 133.6±0.1 km[b] | 1.00 | infobox |
| Hyperion (moon) | Named after | Ὑπερίων Hyperīon[a] | 1.00 | infobox |
| Hyperion (moon) | Orbital period (sidereal) | 21.276658 d | 1.00 | infobox |
| Hyperion (moon) | Pronunciation | /haɪˈpɪəriən/[a] | 1.00 | infobox |
| Hyperion (moon) | Satellite of | Saturn | 1.00 | infobox |
| Hyperion (moon) | Semi-major axis | 1,481,500 km (920,600 mi) | 1.00 | infobox |
| Hyperion (moon) | Surface gravity | 17.1–21.7 mm/s2 (depending on location) | 1.00 | infobox |
| Hyperion (moon) | Surface temp. | Surface temp. min mean max K 58 ± 2 93 115 ± 2 °C −215 ± 2 −180 −158 ± 2 | 1.00 | infobox |
| Hyperion (moon) | Synodic rotation period | Chaotic rotation | 1.00 | infobox |
| Hyperion (moon) | Volume | 9841694±100 km3 | 1.00 | infobox |
| Hyperion (moon) | °C | −215 ± 2 | 1.00 | infobox |
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