| 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 | 184.93 km |
| Rotation period | 12 hours |
| Spectral class | C |
| Abs. magnitude | 7.58 |
| Albedo 4 | 0.048 |
| History 2 | |
| Discoverer | P. M. Henry, 1875 |
154 Bertha is a very dark and very large outer Main belt asteroid. 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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| Previous minor planet | 154 Bertha | Next minor planet |
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| Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Neptune Trojans · Comets · Trans-Neptunians (Kuiper belt • Scattered disc objects • Oort cloud) |
| For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons, meteoroids and the Solar System. For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names. |
