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Discovery
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| Discovered by | Johann Palisa |
| Discovery date | March 20, 1890 |
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Designations
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| Named after | Brno |
| Minor planet category |
main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 440.159 Gm (2.942 AU) |
| Perihelion | 259.103 Gm (1.732 AU) |
| Semi-major axis | 349.631 Gm (2.337 AU) |
| Eccentricity | 0.259 |
| Orbital period | 1305.02 d (3.57 a) |
| Average orbital speed | 19.48 km/s |
| Mean anomaly | 93.824° |
| Inclination | 22.308° |
| Longitude of ascending node | 10.64° |
| Argument of perihelion | 104.792° |
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Physical characteristics
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| Dimensions | 11 - 24 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) | 11.5 |
290 Bruna is a small main belt asteroid.
It was discovered on March 20, 1890 by Johann Palisa, an Austrian astronomer at the Vienna Observatory.
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