104 Klymene
Main-belt asteroid
From Wikipedia, the free encyclopedia
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]
_Klymene.png)
3D convex shape model of 104 Klymene | |
| Discovery | |
|---|---|
| Discovered by | James Craig Watson |
| Discovery date | 13 September 1868 |
| Designations | |
| (104) Klymene | |
| Pronunciation | /ËklɪmɪniË/[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 à 103 km (± 3 km à 5 km)[4] |
| 136.553±1.554 km[3] 133 km[4] | |
| Mass | (1.835 ± 0.880/0.495)Ã1018 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.
Notes
- Assuming a diameter of 128.99 ± 3.8 km.
