.png) A three-dimensional model of 68 Leto based on its light curve. | |
| Discovery | |
|---|---|
| Discovered by | Karl Theodor Robert Luther |
| Discovery date | 29 April 1861 |
| Designations | |
| (68) Leto | |
| Pronunciation | /ˈlɛtoʊ/[1] |
Named after | ΛητώLētō |
| Main belt | |
| Adjectives | Letoian/liːˈtoʊ.iən/[2][3] |
| Orbital characteristics[4] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 152.08 yr (55548 d) |
| Aphelion | 3.30153 AU (493.902 Gm) |
| Perihelion | 2.26072 AU (338.199 Gm) |
| 2.78112 AU (416.050 Gm) | |
| Eccentricity | 0.18712 |
| 4.64 yr (1,694.1 d) | |
| 48.7204° | |
| 0° 12m 45.025s / day | |
| Inclination | 7.97189° |
| 44.1270° | |
| 304.826° | |
| Physical characteristics | |
| Dimensions | 122.57±5.3 km[4] 124.96±6.42 km[5] |
| Mass | (3.28±1.90)×1018 kg[5] |
Meandensity | 3.21±1.92 g/cm3[5] |
| 14.848 h (0.6187 d) | |
| 0.2283±0.021[4] 0.228[6] | |
| S | |
| 9.56(brightest) | |
| 6.78 | |
68 Leto is a largemain beltasteroid that is orbiting theSun. The asteroid was discovered by German astronomerRobert Luther on April 29, 1861, and is named afterLeto, the mother ofApollo andArtemis inGreek mythology. It orbits at a distance of 2.78112AU over 4.64 years and has anorbital eccentricity of 0.187. Theorbital plane isinclined at an angle of 7.97° to theecliptic.[4]
Photometric observations of 68 Leto during 1997 provided a rotation period of 14.856 ± 0.024 h.[7] It has an estimated cross-sectional size of 123 km. The spectral type isS, suggesting a stony,silicate composition.
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