127 Johanna
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Discovery
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| Discovered by | Paul Henry and Prosper Henry |
| Discovery date | November 5, 1872 |
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Designations
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| Alternative names | |
| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 438.576 Gm (2.932 AU) |
| Perihelion | 385.859 Gm (2.579 AU) |
| Semi-major axis | 412.218 Gm (2.756 AU) |
| Eccentricity | 0.064 |
| Orbital period | 1670.707 d (4.57 a) |
| Average orbital speed | 17.92 km/s |
| Mean anomaly | 36.831° |
| Inclination | 8.245° |
| Longitude of ascending node | 31.448° |
| Argument of perihelion | 91.496° |
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Physical characteristics
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| Dimensions | 122 km |
| Mass | ?×10? kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | ? m/s² |
| Escape velocity | ? km/s |
| Rotation period | ? d |
| Albedo | ? |
| Temperature | ~168 K |
| Spectral type | C |
| Absolute magnitude | 8.3 |
127 Johanna is a large Main belt asteroid. It has a very dark surface and probably a primitive composition of carbonates. It was discovered by P. M. Henry on November 5, 1872 and is believed to be named after Joan of Arc.
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