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Lysithea (moon)

Lysithea
Lysithea2.jpg
Discovery
Discovered byS. B. Nicholson
Discovery dateJuly 6, 1938[1]
Designations
Designation
Jupiter
Pronunciation/lˈsɪθiə/[2][3]
Named after
Λυσιθέα Lysithea
AdjectivesLysithean /lˈsɪθiən/[4]
Orbital characteristics[5]
11717000 km
Eccentricity0.112
+259.2 days
329.1°
Inclination28.30°
5.5°
49.5°
Satellite ofJupiter
GroupHimalia group
Physical characteristics
Mean diameter
38 km
Mass6.3×1016 kg[citation needed]
Mean density
2.6 g/cm3 (assumed)[6]
~0.013 m/s2 (0.001 g)
~0.022 km/s
Albedo0.04 (assumed)[6]
Temperature~124 K
18.2

Lysithea /lˈsɪθiə/ is a prograde irregular satellite of Jupiter. It was discovered by Seth Barnes Nicholson in 1938 at Mount Wilson Observatory[1] and is named after the mythological Lysithea, daughter of Oceanus and one of Zeus' lovers.[7]

Lysithea did not receive its present name until 1975; before then, it was simply known as Jupiter X. It was sometimes called "Demeter"[8] from 1955 to 1975.

It belongs to the Himalia group, five moons orbiting between 11 and 13 Gm from Jupiter at an inclination of about 28.3°.[9] Its orbital elements are as of January 2000. They are continuously changing due to solar and planetary perturbations.

See also

References

  1. ^ a b Nicholson, S. B. (October 1938). "Two New Satellites of Jupiter". Publications of the Astronomical Society of the Pacific. 50: 292–293. Bibcode:1938PASP...50..292N. doi:10.1086/124963.
  2. ^ "Lysithea". Dictionary.com Unabridged. Random House.
  3. ^ Cf. also 'Lysithous' in Noah Webster (1884) A Practical Dictionary of the English Language
  4. ^ Yenne (1987) The Atlas of the Solar System.
  5. ^ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
  6. ^ a b "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). Retrieved December 12, 2008.
  7. ^ Marsden, Brian G. (October 7, 1975). "Satellites of Jupiter". International Astronomical Union.
  8. ^ Payne-Gaposchkin, Cecilia; Katherine Haramundanis (1970). Introduction to Astronomy. Englewood Cliffs, N.J.: Prentice-Hall. ISBN 0-13-478107-4.
  9. ^ Jacobson, R.A. (2000). "The orbits of outer Jovian satellites" (PDF). Astronomical Journal. 120 (5): 2679–2686. Bibcode:2000AJ....120.2679J. doi:10.1086/316817.

External links