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Discovery
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|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | May 3, 1888 |
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Designations
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| Minor planet category |
Main belt (Koronis) |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 470.106 Gm (3.142 AU) |
| Perihelion | 393.543 Gm (2.631 AU) |
| Semi-major axis | 431.825 Gm (2.887 AU) |
| Eccentricity | 0.089 |
| Orbital period | 1791.278 d (4.9 a) |
| Average orbital speed | 17.53 km/s |
| Mean anomaly | 145.516° |
| Inclination | 1.156° |
| Longitude of ascending node | 231.771° |
| Argument of perihelion | 134.12° |
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Physical characteristics
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| Dimensions | 27.0 km |
| Mass | unknown |
| Mean density | unknown |
| Equatorial surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | unknown |
| Albedo | unknown |
| Temperature | unknown |
| Spectral type | unknown |
| Absolute magnitude (H) | 9.84 |
277 Elvira is a typical main belt asteroid and a member of the Koronis asteroid family.
It was discovered by Auguste Charlois on May 3, 1888 in Nice. (277) Elvira is possibly named for a character in Alphonse de Lamartine’s Méditations poétiques (1820) and Harmonies poétiques et religieuses (1830).[1]
A group of astronomers, including Lucy D’Escoffier Crespo da Silva and Richard P. Binzel, used observations made between 1998 through 2000 to determine the spin-vector alignment of the Koronis family of asteroids, including 277 Elvira. The collaborative work resulted in the creation of 61 new individual rotation lightcurves to augment previous published observations.[2]
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