60 Echo
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Discovery
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| Discovered by | James Ferguson |
| Discovery date | September 14, 1860 |
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Designations
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| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 423.339 Gm (2.830 AU) |
| Perihelion | 292.951 Gm (1.958 AU) |
| Semi-major axis | 358.145 Gm (2.394 AU) |
| Eccentricity | 0.182 |
| Orbital period | 1353.002 d (3.70 a) |
| Average orbital speed | 19.09 km/s |
| Mean anomaly | 91.065° |
| Inclination | 3.602° |
| Longitude of ascending node | 191.803° |
| Argument of perihelion | 270.477° |
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Physical characteristics
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| Dimensions | 60.2 km |
| Mass | 2.3×1017 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0168 m/s² |
| Escape velocity | 0.0318 km/s |
| Rotation period | ? d |
| Albedo | 0.254 [1] |
| Temperature | ~180 K |
| Spectral type | S |
| Absolute magnitude | 8.21 |
60 Echo is a quite large Main belt asteroid It is an S-type asteroid. Echo was discovered by James Ferguson on September 14, 1860 It was his third and final asteroid discovery It is named after Echo a nymph in Greek mythology.
[edit] References
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