Astronomy:68 Leto
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Short description: Main-belt asteroid
.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 | Λητώ Lētō |
| Minor planet category | 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) |
| |{{{apsis}}}|helion}} | 3.30153 astronomical unit|AU (493.902 Gm) |
| |{{{apsis}}}|helion}} | 2.26072 AU (338.199 Gm) |
| 2.78112 AU (416.050 Gm) | |
| Eccentricity | 0.18712 |
| Orbital period | 4.64 yr (1,694.1 d) |
| Mean anomaly | 48.7204° |
| Mean motion | 0° 12m 45.025s / day |
| Inclination | 7.97189° |
| Longitude of ascending node | 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] |
| Rotation period | 14.848 h (0.6187 d) |
| Geometric albedo | 0.2283±0.021[4] 0.228[6] |
| S | |
| Apparent magnitude | 9.56 (brightest) |
| Absolute magnitude (H) | 6.78 |
Leto (minor planet designation: 68 Leto) is a large main belt asteroid that is orbiting the Sun. 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 is orbiting at a distance of 2.78112 astronomical unit|AU with a period of 4.64 years and an orbital eccentricity of 0.187. The orbital plane is inclined at an angle of 7.97° to the ecliptic.[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 is S, suggesting a stony, silicate composition.
References
- ↑ "Leto". Leto. Oxford University Press. http://www.lexico.com/definition/Leto.
- ↑ 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
- ↑ 4.0 4.1 4.2 4.3 "68 Leto". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=68;cad=1.
- ↑ 5.0 5.1 5.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73 (1): 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ "Asteroid Data Sets". http://www.psi.edu/pds/resource/albedo.html.
- ↑ López-González, M. J.; Rodríguez, E. (September 2005), "Lightcurves and poles of seven asteroids", Planetary and Space Science 53 (11): 1147–1165, doi:10.1016/j.pss.2005.04.010, Bibcode: 2005P&SS...53.1147L
External links
- 68 Leto at AstDyS-2, Asteroids—Dynamic Site
- 68 Leto at the JPL Small-Body Database
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