| Discovery | |
|---|---|
| Discovered by: | Annibale de Gasparis |
| Discovery date: | May 11, 1850 |
| Orbital characteristics | |
| Epoch July 14, 2004 (JD 2453200.5) | |
| Aphelion | 403.494 Gm (2.697 AU) |
| Perihelion: | 330.297 Gm (2.208 AU) |
| Semi-major axis: | 366.896 Gm (2.453 AU) |
| Eccentricity: | 0.100 |
| Orbital period: | 1402.891 d (3.84 a) |
| Avg. orbital speed: | 19.02 km/s |
| Mean anomaly: | 333.562° |
| Inclination: | 4.624° |
| Longitude of ascending node: | 125.637° |
| Argument of perihelion: | 195.436° |
| Physical characteristics | |
| Dimensions: | 153.3 km |
| Mass: | 5.13×1018 kg[1] |
| Mean density: | 2.72 g/cm³[1] |
| Equatorial surface gravity: | 0.0578 m/s² |
| Escape velocity: | 0.0941 km/s |
| Rotation period: | 0.393 d[2] |
| Albedo: | 0.180 (geometric) [3] |
| Temperature: | ~174 K |
| Spectral type: | S-type asteroid |
| Apparent magnitude: | 8.62 to 12.10 |
| Absolute magnitude: | 6.55 |
| Angular diameter: | 0.178" to 0.057" |
11 Parthenope (pronounced /pɑrˈθɛnəpi/, Greek: Παρθενόπη) is a large, bright Main belt asteroid. Parthenope was discovered by Annibale de Gasparis on May 11, 1850, the second of his nine asteroid discoveries. It was named after one of the Sirens in Greek mythology, said to have founded the city of Naples. De Gasparis "used his utmost endeavours to realise a 'Parthenope' in the heavens, such being the name suggested by Sir John Herschel on the occasion of the discovery of Hygeia in 1849".[4] There has been one observed Parthenopian occultation, on February 13, 1987.
References
- ^ a b http://www.psi.edu/pds/archive/density.html
- ^ http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm
- ^ http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab
- ^ De Gasparis, Annibale (May 1850). "The New Planet Parthenope". Monthly notices of the Royal Astronomical Society 10: 144–147.
External links
- Orbital simulation from JPL (Java) / Ephemeris
| Minor planets (see full list) |
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| Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Neptune Trojans · Comets · Trans-Neptunians (Kuiper belt • Scattered disc objects • Oort cloud) |
| For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons, meteoroids and the Solar System. For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names. |
