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Discovery
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| Discovered by | Ernst Wilhelm Tempel |
| Discovery date | February 17, 1868 |
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Designations
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| Named after | Clotho |
| Alternate name(s) | |
| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 501.752 Gm (3.354 AU) |
| Perihelion | 296.593 Gm (1.983 AU) |
| Semi-major axis | 399.173 Gm (2.668 AU) |
| Eccentricity | 0.257 |
| Orbital period | 1592.030 d (4.36 a) |
| Average orbital speed | 17.93 km/s |
| Mean anomaly | 14.314° |
| Inclination | 11.783° |
| Longitude of ascending node | 159.776° |
| Argument of perihelion | 268.671° |
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Physical characteristics
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| Dimensions | 82.8 km |
| Mass | 5.9×1017 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0231 m/s² |
| Escape velocity | 0.0438 km/s |
| Rotation period | ? d |
| Albedo | 0.229 [1] |
| Temperature | ~170 K |
| Spectral type | M |
| Absolute magnitude (H) | 7.63 |
97 Klotho ( /ˈkloʊθoʊ/ kloh-thoh) is a fairly large main-belt asteroid. While it is an M-type, its radar albedo is too low to allow a nickel-iron composition. Klotho is similar to 21 Lutetia and 22 Kalliope in that all three are M-types of unknown composition. Klotho was found by Ernst Tempel on February 17, 1868. It was his fifth and final asteroid discovery. It is named after Klotho or Clotho, one of the three Moirae, or Fates, in Greek mythology.
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