138 Tolosa
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Discovery
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| Discovered by | Henri Joseph Perrotin |
| Discovery date | March 19, 1874 |
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Designations
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| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 425.819 Gm (2.846 AU) |
| Perihelion | 306.744 Gm (2.050 AU) |
| Semi-major axis | 366.282 Gm (2.448 AU) |
| Eccentricity | 0.163 |
| Orbital period | 1399.371 d (3.83 a) |
| Average orbital speed | 18.91 km/s |
| Mean anomaly | 168.932° |
| Inclination | 3.208° |
| Longitude of ascending node | 54.948° |
| Argument of perihelion | 260.018° |
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Physical characteristics
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| Dimensions | 45.5 km |
| Mass | 9.9×1016 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0127 m/s² |
| Escape velocity | 0.0241 km/s |
| Rotation period | ? d |
| Albedo | ? |
| Temperature | ~178 K |
| Spectral type | S |
| Absolute magnitude | 8.75 |
138 Tolosa (to-loe'-za, Latin Tolōsa) is a brightly coloured, stony Main belt asteroid. It was discovered by Henri Joseph Perrotin on May 19, 1874 and named after the Latin for Toulouse, France.
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