Cordelia (moon)

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Cordelia
Cordelia
Cordelia (lower-middle, inside of bright ring), discovery image from Voyager 2
Discovery
Discovered by Richard J. Terrile / Voyager 2
Discovery date January 20, 1986
Orbital characteristics
Mean orbit radius
 49751.722 ± 0.149 km[1]
Eccentricity 0.00026 ± 0.000096[1]
0.33503384 ± 0.00000058 d[1]
Inclination 0.08479 ± 0.031° (to Uranus' equator)[1]
Satellite of Uranus
Physical characteristics
Dimensions 50 × 36 × 36 km[2]
Mean radius
 20.1 ± 3 km[2][3][4]
~5500 km²[lower-alpha 1]
Volume ~38,900 km³[lower-alpha 1]
Mass ~4.4×1016 kg[lower-alpha 1]
Mean density
 ~1.3 g/cm³ (assumed)[3]
~0.0073 m/s²[lower-alpha 1]
~0.017 km/s[lower-alpha 1]
synchronous[2]
zero[2]
Albedo <templatestyles src="Plainlist/styles.css"/>
Temperature ~64 K[lower-alpha 1]

Cordelia (/kɔːrˈdiːliə/ kor-DEE-lee-ə) is the innermost known moon of Uranus. It was discovered from the images taken by Voyager 2 on January 20, 1986, and was given the temporary designation S/1986 U 7.[6] It was not detected again until the Hubble Space Telescope observed it in 1997.[5][7] Cordelia takes its name from the youngest daughter of Lear in William Shakespeare's King Lear. It is also designated Uranus VI.[8]

Other than its orbit,[1] radius of 20 km[2] and geometric albedo of 0.08[5] virtually nothing is known about it. In the Voyager 2 images Cordelia appears as an elongated object with its major axis pointing towards Uranus. The ratio of axes of Cordelia's prolate spheroid is 0.7 ± 0.2.[2]

Cordelia acts as the inner shepherd satellite for Uranus' Epsilon ring.[9] Cordelia's orbit is within Uranus' synchronous orbit radius, and is therefore slowly decaying due to tidal deceleration.[2]

Cordelia is very close to a 5:3 orbital resonance with Rosalind.[10]

See also

References

Explanatory notes

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Calculated on the basis of other parameters.

Citations

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ 3.0 3.1 3.2 Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.

External links

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