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Discovery
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| Discovered by | Auguste Charlois |
| Discovery date | March 10, 1890 |
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Designations
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| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 518.363 Gm (3.465 AU) |
| Perihelion | 340.911 Gm (2.279 AU) |
| Semi-major axis | 429.637 Gm (2.872 AU) |
| Eccentricity | 0.207 |
| Orbital period | 1777.686 d (4.87 a) |
| Average orbital speed | 17.58 km/s |
| Mean anomaly | 333.503° |
| Inclination | 6.691° |
| Longitude of ascending node | 182.208° |
| Argument of perihelion | 189.656° |
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Physical characteristics
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| Dimensions | 34.0 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) | 9.51 |
289 Nenetta is a typical Main belt asteroid.
It was discovered by Auguste Charlois on March 10, 1890 in Nice.
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