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Discovery
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| Discovered by | Johann Palisa |
| Discovery date | October 13, 1879 |
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Designations
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| Named after | Martha |
| Alternate name(s) | n/a |
| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 430.602 Gm (2.878 AU) |
| Perihelion | 400.314 Gm (2.676 AU) |
| Semi-major axis | 415.458 Gm (2.777 AU) |
| Eccentricity | 0.036 |
| Orbital period | 1690.412 d (4.63 a) |
| Average orbital speed | 17.87 km/s |
| Mean anomaly | 29.923° |
| Inclination | 10.695° |
| Longitude of ascending node | 212.069° |
| Argument of perihelion | 171.423° |
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Physical characteristics
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| Dimensions | 81.0 km |
| Mass | unknown |
| Mean density | unknown |
| Equatorial surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | 9.637 h |
| Albedo | 0.054 |
| Temperature | unknown |
| Spectral type | C |
| Absolute magnitude (H) | 9.23 |
205 Martha is a large Main belt asteroid. It is a dark, primitive carbonaceous C-type asteroid.
It was discovered by Johann Palisa on October 13, 1879 in Pola and was named after Martha, a woman in the New Testament.
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