104 Klymene

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104 Klymene
000104-asteroid shape model (104) Klymene.png
3D convex shape model of 104 Klymene
Discovery
Discovered by James Craig Watson
Discovery date13 September 1868
Designations
(104) Klymene
Pronunciation /ˈklɪmɪn/ [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
Dimensions163 km × 103 km3 km × 5 km) [4]
Mean diameter
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] [lower-alpha 1]
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]

    Klymene (minor planet designation: 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]

    Contents

    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

    1. Assuming a diameter of 128.99 ± 3.8 km.

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    References

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