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Discovery
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| Discovered by | Johann Palisa |
| Discovery date | February 25, 1887 |
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Designations
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| Alternate name(s) | 1933 QN, 1933 RC |
| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 458.943 Gm (3.068 AU) |
| Perihelion | 265.134 Gm (1.772 AU) |
| Semi-major axis | 362.038 Gm (2.42 AU) |
| Eccentricity | 0.268 |
| Orbital period | 1375.098 d (3.76 a) |
| Average orbital speed | 19.15 km/s |
| Mean anomaly | 64.923° |
| Inclination | 25.63° |
| Longitude of ascending node | 335.642° |
| Argument of perihelion | 251.778° |
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Physical characteristics
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| Dimensions | 24.0 km |
| Mass | unknown |
| Mean density | unknown |
| Equatorial surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | 11.681 h |
| Albedo | unknown |
| Temperature | unknown |
| Spectral type | unknown |
| Absolute magnitude (H) | 11.2 |
265 Anna is a typical Main belt asteroid.
It was discovered by Johann Palisa on February 25, 1887 in Vienna and was probably named after the daughter of astronomer Edmund Weiss.
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