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Discovery
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| Discovered by | Johann Palisa |
| Discovery date | August 19, 1882 |
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Designations
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| Alternate name(s) | n/a |
| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 409.011 Gm (2.734 AU) |
| Perihelion | 249.578 Gm (1.668 AU) |
| Semi-major axis | 329.294 Gm (2.201 AU) |
| Eccentricity | 0.242 |
| Orbital period | 1192.83 d (3.27 a) |
| Average orbital speed | 20.08 km/s |
| Mean anomaly | 172.307° |
| Inclination | 2.541° |
| Longitude of ascending node | 313.532° |
| Argument of perihelion | 18.609° |
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Physical characteristics
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| Dimensions | 9.0 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) | 12.48 |
228 Agathe is a small main belt asteroid.
It was discovered by Johann Palisa on August 19, 1882 in Vienna.
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