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Discovery
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| Discovered by | C. H. F. Peters |
| Discovery date | September 25, 1879 |
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Designations
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| Named after | Pompeii |
| Alternate name(s) | A895 EA |
| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 434.131 Gm (2.902 AU) |
| Perihelion | 384.513 Gm (2.57 AU) |
| Semi-major axis | 409.322 Gm (2.736 AU) |
| Eccentricity | 0.061 |
| Orbital period | 1653.102 d (4.53 a) |
| Average orbital speed | 18.01 km/s |
| Mean anomaly | 210.675° |
| Inclination | 3.185° |
| Longitude of ascending node | 348.019° |
| Argument of perihelion | 59.83° |
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Physical characteristics
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| Dimensions | 116.0 km |
| Mass | unknown |
| Mean density | unknown |
| Equatorial surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | 46.60 h |
| Albedo | 0.041 |
| Temperature | unknown |
| Spectral type | DCX: |
| Absolute magnitude (H) | 8.76 |
203 Pompeja is a quite large main-belt asteroid.
It was discovered by C. H. F. Peters on September 25, 1879, in Clinton, New York, and named after Pompeii, the Roman town destroyed in volcanic eruption in 79 AD.
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