68 Leto
Leto (minor planet designation: 68 Leto) is a large main belt asteroid that is orbiting the Sun with a period of 4.64 years. Its spectral type is S, suggesting a stony, silicate composition. The asteroid was discovered by German astronomer Robert Luther on April 29, 1861, and is named after Leto, the mother of Apollo and Artemis in Greek mythology. It has an estimated cross-sectional size of 123 km and a rotation period of 14.8 hours.
.png.webp) 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 | Λητώ Lētō |
| 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 (1694.1 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] |
Mean density | 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 | |
References
- "Leto". Lexico UK Dictionary. Oxford University Press.
- E. Alan Roberts (2013) The Courage of Innocence: (The Virgin of Phileros), p. 191
- Greek Λητῷος – Lētōi-os. Liddell, Henry George; Scott, Robert; A Greek–English Lexicon at the Perseus Project
- "68 Leto". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
- Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 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 Archived 2010-01-17 at WebCite
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