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] | |
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]
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.
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] | |
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]
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.