104 Klymene is a large, dark Themistian asteroid that was discovered by J. C. Watson on September 13, 1868, and named after one of the many Clymenes in Greek mythology.[6] It is orbiting the Sun with a period of 5.60 years and an eccentricity of 0.16. The orbital plane is inclined by 2.8° to the plane of the ecliptic. It is classified as a C-type asteroid, indicating it probably has a carbonaceous composition. The spectra indicates the presence of aqueous-altered minerals on the surface[7] based upon a sharp feature at a wavelength of 3 μm, and, as of 2015, is the only member of the Themis family found to show this absorption.[8]
| Discovery | |
|---|---|
| Discovered by | James Craig Watson |
| Discovery date | 13 September 1868 |
| Designations | |
| (104) Klymene | |
| Pronunciation | /ˈklɪmɪniː/[1] |
| A868 RB, 1893 FA 1951 OE, 1968 OS[2] | |
| Main belt | |
| Orbital characteristics[3] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 130.58 yr (47693 d) |
| Aphelion | 3.6499 AU (546.02 Gm) |
| Perihelion | 2.65525 AU (397.220 Gm) |
| 3.15256 AU (471.616 Gm) | |
| Eccentricity | 0.15775 |
| 5.60 yr (2044.5 d) | |
Average orbital speed | 16.67 km/s |
| 101.498° | |
| 0° 10m 33.888s / day | |
| Inclination | 2.7905° |
| 41.698° | |
| 32.134° | |
| Earth MOID | 1.66901 AU (249.680 Gm) |
| Jupiter MOID | 1.63907 AU (245.201 Gm) |
| TJupiter | 3.186 |
| Physical characteristics | |
| Dimensions | 163 km × 103 km (± 3 km × 5 km)[4] |
| 136.553±1.554 km[3] 133 km[4] | |
| Mass | (1.835 ± 0.880/0.495)×1018 kg[5] |
Mean density | 1.633 ± 0.783/0.441 g/cm3[5][a] |
Equatorial surface gravity | 0.0263 m/s2 |
Equatorial escape velocity | 0.0599 km/s |
| 8.984 h (0.3743 d)[3] | |
| 0.052±0.006[3] | |
| Temperature | ~157 K |
| C | |
| 8.58[3] | |
Based upon measurements made using adaptive optics at the W. M. Keck Observatory, this object may have a bi-lobed shape with a length of 163 ± 3 km and width of 103 ± 5 km, for an average dimension of 133 km.[4] This asteroid is located near the region of the Themis family but itself considered a background asteroid using HCM-analysis.[9] It is listed as a member of the Hecuba group of asteroids that orbit near the 2:1 mean-motion resonance with Jupiter.[10]
104 Klymene has been observed to occult 6 stars between 2009 and 2023.
- ^ Assuming a diameter of 128.99 ± 3.8 km.
- ^ Noah Webster (1884) A Practical Dictionary of the English Language
- ^ Bowen, Eliza A. (1893), “Visualizing the Earth’s annual motion”, Popular Astronomy, 1: 178–179, Bibcode:1893PA……1..178B.
- ^ a b c d e Yeomans, Donald K., “104 Klymene”, JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- ^ a b c Marchis, F.; et al. (November 2006), “Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey”, Icarus, vol. 185, no. 1, pp. 39–63, Bibcode:2006Icar..185…39M, doi:10.1016/j.icarus.2006.06.001, PMC 2600456, PMID 19081813.
- ^ a b Fienga, A.; Avdellidou, C.; Hanuš, J. (February 2020). “Asteroid masses obtained with INPOP planetary ephemerides”. Monthly Notices of the Royal Astronomical Society. 492 (1). doi:10.1093/mnras/stz3407.
- ^ Dictionary of minor planet names, International Astronomical Union. Springer, 2003, p. 25
- ^ Fornasier, S.; et al. (February 1999), “Spectroscopic comparison of aqueous altered asteroids with CM2 carbonaceous chondrite meteorites”, Astronomy and Astrophysics Supplement Series, 135 (1): 65–73, Bibcode:1999A&AS..135…65F, doi:10.1051/aas:1999161.
- ^ Hargrove, Kelsey D.; et al. (July 2015), “Asteroid (90) Antiope: Another icy member of the Themis family?”, Icarus, 254: 150–156, Bibcode:2015Icar..254..150H, doi:10.1016/j.icarus.2015.03.008.
- ^ Moore, Patrick; Rees, Robin, eds. (2011), “Patrick Moore’s Data Book of Astronomy”, Patrick Moore’s Data Book of Astronomy by Patrick Moore and Robin Rees. Cambridge University Press (2nd ed.), Cambridge University Press: 165, Bibcode:2011pmdb.book…..M, ISBN 9781139495226.
- ^ McDonald, Sophia Levy (June 1948), “General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group”, Astronomical Journal, vol. 53, p. 199, Bibcode:1948AJ…..53..199M, doi:10.1086/106097.
- 104 Klymene at AstDyS-2, Asteroids—Dynamic Site
- 104 Klymene at the JPL Small-Body Database
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