68 Leto
.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 | |
Named after | Leto |
| Main belt | |
| Orbital characteristics[1] | |
| 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 (1694.1 d) | |
Average orbital speed | 17.70 km/s |
| 48.7204° | |
| 0° 12m 45.025s / day | |
| Inclination | 7.97189° |
| 44.1270° | |
| 304.826° | |
| Earth MOID | 1.26556 AU (189.325 Gm) |
| Jupiter MOID | 2.16133 AU (323.330 Gm) |
| TJupiter | 3.293 |
| Physical characteristics | |
| Dimensions | 122.57±5.3 km[1] 124.96 ± 6.42 km[2] |
| Mass | (3.28 ± 1.90) × 1018 kg[2] |
Mean density | 3.21 ± 1.92 g/cm3[2] |
Equatorial surface gravity | 0.0343 m/s² |
Equatorial escape velocity | 0.0648 km/s |
| 14.848 h (0.6187 d) | |
| 0.2283±0.021[1] 0.228 (geometric)[3] | |
| Temperature | ~167 K |
| S | |
| 9.56 (brightest) | |
| 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.
References
- ^ a b c "68 Leto". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
- ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- ^ Asteroid Data Sets
External links
- Orbital simulation from JPL (Java)
- Ephemeris
- 68 Leto at the JPL Small-Body Database
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