60 Echo
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Discovery | |
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Discovered by: | James Ferguson |
Discovery date: | September 14, 1860 |
Orbital characteristics | |
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) |
Avg. orbital speed: | 19.09 km/s |
Mean anomaly: | 91.065° |
Inclination: | 3.602° |
Longitude of ascending node: | 191.803° |
Argument of perihelion: | 270.477° |
Physical characteristics | |
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 big Main belt asteroid. It is an S-type asteroid. Echo was found by James Ferguson on September 14 1860. It was the third and last asteroid he found. It is named after Echo, a nymph in Greek mythology.
[change] References
- ↑ About the 60 Echo. www.psi.edu. Retrieved on 17 June 2008.
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