11 Parthenope
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| Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html) | |
|---|---|
| Discoverer | Annibale de Gasparis |
| Discovery date | May 11, 1850 |
| Alternate designations | B (http://cfa-www.harvard.edu/iau/MPDes.html) |
| Category | Main belt |
| Orbital elements C (http://asteroid.lowell.edu/) Epoch July 14, 2004 (JD 2453200.5) | |
| Eccentricity (e) | 0.100 |
| Semi-major axis (a) | 366.896 Gm (2.453 AU) |
| Perihelion (q) | 330.297 Gm (2.208 AU) |
| Aphelion (Q) | 403.494 Gm (2.697 AU) |
| Orbital period (P) | 1402.891 d (3.84 a) |
| Mean orbital speed | 19.02 km/s |
| Inclination (i) | 4.624° |
| Longitude of the ascending node (Ω) | 125.637° |
| Argument of perihelion (ω) | 195.436° |
| Mean anomaly (M) | 333.562° |
| Physical characteristics | |
| Dimensions | 153.3 km |
| Mass | 5.13×1018 kg 1 (http://www.psi.edu/pds/archive/density.html) |
| Density | 2.72 g/cm³ 1 (http://www.psi.edu/pds/archive/density.html) |
| Surface gravity | 0.0578 m/s² |
| Escape velocity | 0.0941 km/s |
| Rotation period | 0.393 d 2 (http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm) |
| Spectral class | S-type asteroid |
| Absolute magnitude | 6.55 |
| Albedo | 0.180 3 (http://dorothy.as.arizona.edu/DSN/IRAS/IMPS/diamalb.html) |
| Mean surface temperature | ~182 K |
11 Parthenope (par-then'-a-pee) is a large, bright Main belt asteroid. It is a mixture of metallic nickel-iron with magnesium- and iron silicates.
Parthenope was discovered by A. de Gasparis on May 11, 1850, his second of many 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 10 Hygiea in 1849" (De Gasparis, Annibale, The New Planet Parthenope, Monthly notices of the Royal Astronomical Society, Vol. 10, pp. 144–147 (May 1850) (http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1850MNRAS..10..145.&db_key=AST&high=40daf3f6f909335)).
There has been one observed stellar occultation by Parthenope, on February 13, 1987.
| The minor planets |
| Vulcanoids | Main belt | Groups and families | Near-Earth objects | Jupiter Trojans |
| Centaurs | Trans-Neptunians | Damocloids | Comets | Kuiper belt | Oort cloud |
| (For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system) |
| (For a complete listing, see: List of asteroids. For pronunciation, see: Pronunciation of asteroid names.) |
es:(11) Parténope fr:11 Parthénope pl:Parthenope (astronomia) pt:11 Parténope