65 Cybele
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| Discovery | |
|---|---|
| Discovered by: | Ernst Wilhelm Tempel |
| Discovery date: | March 8, 1861 |
| Alternative names: | |
| Minor planet category: | Main belt (Cybele) |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion distance: | 567.544 Gm (3.794 AU) |
| Perihelion distance: | 459.654 Gm (3.073 AU) |
| Semi-major axis: | 513.599 Gm (3.433 AU) |
| Eccentricity: | 0.105 |
| Orbital period: | 2323.521 d (6.36 a) |
| Avg. orbital speed: | 16.03 km/s |
| Mean anomaly: | 279.683° |
| Inclination: | 3.548° |
| Longitude of ascending node: | 155.808° |
| Argument of perihelion: | 105.757° |
| Physical characteristics | |
| Dimensions: | 237.3 km |
| Mass: | 1.4×1019 kg |
| Mean density: | ? g/cm³ |
| Equatorial surface gravity: | 0.0663 m/s² |
| Escape velocity: | 0.1255 km/s |
| Rotation period: | ? d |
| Albedo: | 0.071 [1] |
| Temperature: | ~150 K |
| Spectral type: | C |
| Absolute magnitude: | 6.62 |
65 Cybele (sib'-a-lee) is one of the largest asteroids in the main belt. The Cybele asteroids are named after it. As a C-type asteroid it is dark in color and carbonaceous in composition. It was discovered on March 8, 1861 by Ernst Tempel and named after Cybele the earth goddess.
First Cybelian stellar occultation was observed on October 17, 1979 in the Soviet Union. A diameter of 230 km was derived, closely matching the diameter of 237 km determined by the IRAS satellite. During the same occultation, a hint of a possible 11 km wide satellite was detected. [1]
[edit] References
| Minor planets | ||
|---|---|---|
| Previous minor planet | 65 Cybele | Next minor planet |
| List of asteroids | ||
Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Comets · Trans-Neptunians (Kuiper belt • Scattered disc • Oort cloud)
For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons and the Solar System.
For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.
