154 Bertha
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| Orbital characteristics [1] | |
|---|---|
| Orbit type | Main belt |
| Semimajor axis | 3.189 AU |
| Perihelion distance | 2.920 AU |
| Aphelion distance | 3.459 AU |
| Orbital period | 5.70 years |
| Inclination | 21.03° |
| Eccentricity | 0.084 |
| Physical characteristics [1] | |
| Diameter | 184.9 km |
| Rotation period | 12 hours |
| Abs. magnitude | 7.58 |
| Albedo [4] | 0.048 |
| History [2] | |
| Discoverer | P. M. Henry, 1875 |
It was discovered by brothers Paul Henry and Prosper Henry on November 4, 1875, but the credit from the discovery was given to Prosper. It is probably named after Berthe Martin-Flammarion, sister of the astronomer Camille Flammarion.
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