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Discovery
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| Discovered by | Karl Theodor Robert Luther |
| Discovery date | April 29, 1861 |
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Designations
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| Named after | Leto |
| Alternate name(s) | |
| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 493.518 Gm (3.299 AU) |
| Perihelion | 339.110 Gm (2.267 AU) |
| Semi-major axis | 416.314 Gm (2.783 AU) |
| Eccentricity | 0.185 |
| Orbital period | 1695.670 d (4.64 a) |
| Average orbital speed | 17.70 km/s |
| Mean anomaly | 24.606° |
| Inclination | 7.972° |
| Longitude of ascending node | 44.183° |
| Argument of perihelion | 305.392° |
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Physical characteristics
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| Dimensions | 122.6 km |
| Mass | 1.9×1018 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0343 m/s² |
| Escape velocity | 0.0648 km/s |
| Rotation period | ? d |
| Albedo | 0.228 (geometric)[1] |
| Temperature | ~167 K |
| Spectral type | S |
| Apparent magnitude | 9.56 (brightest) |
| Absolute magnitude (H) | 6.78 |
68 Leto ( /ˈliːtoʊ/ lee-toh; Greek: Λητώ) is a large main belt asteroid. Its spectral type is S. It was discovered by Robert Luther on April 29, 1861. The asteroid is named after Leto, the mother of Apollo and Artemis in Greek mythology.
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