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 (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] |
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 | |
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 orbits at a distance of 2.78112 AU over 4.64 years and has 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.
111 Ate is a main-belt asteroid discovered by the German-American astronomer C. H. F. Peters on August 14, 1870, and named after Ate, the goddess of mischief and destruction in Greek mythology. In the Tholen classification system, it is categorized as a carbonaceous C-type asteroid, while the Bus asteroid taxonomy system lists it as an Ch asteroid.
112 Iphigenia is a fairly large and exceedingly dark main-belt asteroid. It is classified as a C-type asteroid, and therefore probably has a primitive carbonaceous composition. It was discovered by German-American astronomer C. H. F. Peters on September 19, 1870, and named after Iphigenia, a princess sacrificed by her father in Greek mythology. The orbital elements for 112 Iphigenia were published by German astronomer Friedrich Tietjen in 1871.
129 Antigone is a large main-belt asteroid. Radar observations indicate that it is composed of almost pure nickel-iron. It and other similar asteroids probably originate from the core of a shattered Vesta-like planetesimal which had a differentiated interior. It was discovered by German-American astronomer C. H. F. Peters on February 5, 1873, and named after Antigone, the Theban princess in Greek mythology.
185 Eunike is a dark and very large main-belt asteroid, with an approximate diameter of 157 kilometres. It has a primitive carbonaceous composition.
204 Kallisto is a fairly typical, although sizeable Main belt asteroid. It is classified as an S-type asteroid. Like other asteroids of its type, it is light in colour. It was discovered by Johann Palisa on 8 October 1879, in Pola, and was named after the same nymph Callisto in Greek mythology as Jupiter's moon Callisto.
210 Isabella is a large and dark asteroid from the central asteroid belt, approximately 80 kilometers in diameter. It was discovered in Pola by Johann Palisa on 12 November 1879. The origin of the name is unknown. The asteroid is probably composed of material similar to carbonaceous chondrites. It is classified as a member of the Nemesis family of asteroids.
217 Eudora is a large Main belt asteroid. It was discovered by French (Corsican) astronomer J. Coggia on August 30, 1880, in Marseilles, France. It was his fourth asteroid discovery and is named after Eudora, a Hyad in Greek mythology.
221 Eos is a large main-belt asteroid that was discovered by Austrian astronomer Johann Palisa on January 18, 1882, in Vienna. In 1884, it was named after Eos, the Greek goddess of the dawn, to honour the opening of a new observatory that was hoped to bring about a new dawn for Viennese astronomy.
344 Desiderata is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous material.
386 Siegena is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of primitive carbonaceous material.
404 Arsinoë is a large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous material.
410 Chloris is a very large main-belt asteroid that was discovered by Auguste Charlois on January 7, 1896, in Nice. It is classified as a C-type asteroid and is probably composed of primitive carbonaceous material. The spectrum of the asteroid displays evidence of aqueous alteration. It is the namesake of the Chloris family of asteroids.
445 Edna is a large Main belt asteroid.
469 Argentina is an asteroid that was discovered by Luigi Carnera on 20 February 1901. Its provisional name was 1901 GE. 469 Argentina has an estimated rotation period of 12.3 hours.
471 Papagena is an asteroid that was discovered by German astronomer Max Wolf on 7 June 1901. Its provisional name was 1901 GN.
485 Genua is a minor planet orbiting the Sun.
582 Olympia is a minor planet orbiting the Sun.
602 Marianna is a minor planet orbiting the Sun.
626 Notburga is a large, dark asteroid orbiting the Sun in the asteroid belt.
895 Helio is a large dark outer main-belt asteroid about 150 km in diameter. It was discovered on 11 July 1918 by German astronomer Max Wolf. It is named after the element helium, whose spectrum was studied by Friedrich Paschen and Carl David Tolmé Runge, with the asteroid being named by Paschen at Wolf's request; the name helium itself comes from Helios, the Greek god of the Sun.