40 Harmonia
From Wikipedia, the free encyclopedia
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Discovery
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| Discovered by | H. Goldschmidt |
| Discovery date | March 31, 1856 |
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Designations
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| Alternate name(s) | 1950 XU |
| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 355.021 Gm (2.373 AU) |
| Perihelion | 323.537 Gm (2.163 AU) |
| Semi-major axis | 339.279 Gm (2.268 AU) |
| Eccentricity | 0.046 |
| Orbital period | 1247.514 d (3.42 a) |
| Average orbital speed | 19.77 km/s |
| Mean anomaly | 249.120° |
| Inclination | 4.256° |
| Longitude of ascending node | 94.287° |
| Argument of perihelion | 268.988° |
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Physical characteristics
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| Dimensions | 107.6 km |
| Mass | ~1.3×1018 kg |
| Mean density | 2.0? g/cm³ |
| Equatorial surface gravity | ~0.0301 m/s² |
| Escape velocity | ~0.0569 km/s |
| Rotation period | 0.371 d (8.91 h) [1] |
| Albedo | 0.242 (geometric)[2] |
| Temperature | ~177 K |
| Spectral type | S |
| Apparent magnitude | 9.31 (brightest) |
| Absolute magnitude (H) | 7.0 |
40 Harmonia (
/hɑrˈmoʊniə/) is a large main-belt asteroid.
It was discovered by H. Goldschmidt on March 31, 1856, and named after Harmonia, the Greek goddess of harmony. The name was chosen to mark the end of the Crimean War.
[edit] References
- ^ http://charlie.psi.edu/pds/
- ^ "Asteroid Data Archive". Planetary Science Institute. Archived from the original on 2006-06-23. http://web.archive.org/web/20060623213811/http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab. Retrieved 2008-11-03.
[edit] External links
- Orbital simulation from JPL (Java)
- Ephemeris
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