Lysithea (moon)

Lysithea
Discovery
Discovered by	S. B. Nicholson
Discovery date	July 6, 1938
Designations
Designation	Jupiter
Pronunciation	/laɪˈsɪθiə/
Named after	Λυσιθέα Lysithea
Adjectives	Lysithean /laɪˈsɪθiən/
Orbital characteristics
Semi-major axis	11717000 km
Eccentricity	0.112
Orbital period (sidereal)	+259.2 days
Mean anomaly	329.1°
Inclination	28.30°
Longitude of ascending node	5.5°
Argument of perihelion	49.5°
Satellite of	Jupiter
Group	Himalia group
Physical characteristics
Mean diameter	42.2±0.7 km
Mass	6.3×1016 kg[citation needed]
Mean density	2.6 g/cm3 (assumed)
Synodic rotation period	12.78±0.10 h
Albedo	0.036±0.006
Temperature	~124 K
Apparent magnitude	18.2

Lysithea /laɪˈsɪθiə/ 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.^[9]

Lysithea did not receive its present name until 1975; before then, it was simply known as Jupiter X. It was sometimes called "Demeter"^[10] 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°.^[11] Its orbital elements are as of January 2000. They are continuously changing due to solar and planetary perturbations.

Lysithea observed by the Wide-field Infrared Survey Explorer (WISE) spacecraft in 2014

References

^ ^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.
^ "Lysithea". Dictionary.com Unabridged (Online). n.d.
^ Cf. also 'Lysithous' in Noah Webster (1884) A Practical Dictionary of the English Language
^ Yenne (1987) The Atlas of the Solar System.
^ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
^ ^a ^b Grav, T.; Bauer, J. M.; Mainzer, A. K.; Masiero, J. R.; Nugent, C. R.; Cutri, R. M.; et al. (August 2015). "NEOWISE: Observations of the Irregular Satellites of Jupiter and Saturn". The Astrophysical Journal. 809 (1): 9. Bibcode:2015ApJ...809....3G. doi:10.1088/0004-637X/809/1/3. 3.
^ "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). Retrieved December 12, 2008.
^ Luu, Jane (September 1991). "CCD photometry and spectroscopy of the outer Jovian satellites". Astronomical Journal. 102: 1213–1225. Bibcode:1991AJ....102.1213L. doi:10.1086/115949. ISSN 0004-6256.
^ Marsden, Brian G. (October 7, 1975). "Satellites of Jupiter". International Astronomical Union.
^ Payne-Gaposchkin, Cecilia; Katherine Haramundanis (1970). Introduction to Astronomy. Englewood Cliffs, N.J.: Prentice-Hall. ISBN 0-13-478107-4.
^ 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

[Nicholson_1938-1] 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 (Online). n.d.

[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

[Grav2015-6] Grav, T.; Bauer, J. M.; Mainzer, A. K.; Masiero, J. R.; Nugent, C. R.; Cutri, R. M.; et al. (August 2015). "NEOWISE: Observations of the Irregular Satellites of Jupiter and Saturn". The Astrophysical Journal. 809 (1): 9. Bibcode:2015ApJ...809....3G. doi:10.1088/0004-637X/809/1/3. 3.

[jplssd-7] "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). Retrieved December 12, 2008.

[Luu1991-8] Luu, Jane (September 1991). "CCD photometry and spectroscopy of the outer Jovian satellites". Astronomical Journal. 102: 1213–1225. Bibcode:1991AJ....102.1213L. doi:10.1086/115949. ISSN 0004-6256.

[IAUC_2846-9] Marsden, Brian G. (October 7, 1975). "Satellites of Jupiter". International Astronomical Union.

[Gaposchkin-10] Payne-Gaposchkin, Cecilia; Katherine Haramundanis (1970). Introduction to Astronomy. Englewood Cliffs, N.J.: Prentice-Hall. ISBN 0-13-478107-4.

[Jacobson_2000-11] 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.

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v t e Moons of Jupiter
Listed in increasing approximate distance from Jupiter
Inner moons	Metis Adrastea Amalthea Thebe
Galilean moons	Io Europa Ganymede Callisto
Themisto	Themisto
Himalia group (9)	Leda Ersa S/2018 J 2 Himalia Pandia Lysithea Elara S/2011 J 3 Dia
Carpo group (2)	S/2018 J 4 Carpo
Valetudo	Valetudo
Ananke group (26)	Euporie Jupiter LV Eupheme S/2021 J 3 Jupiter LII Jupiter LIV Mneme Euanthe S/2003 J 16 Harpalyke Orthosie S/2022 J 3 Helike S/2021 J 2 Praxidike Jupiter LXIV S/2021 J 1 S/2003 J 12 Jupiter LXVIII Thelxinoe Thyone S/2003 J 2 Ananke Iocaste Hermippe Jupiter LXX
Carme group (30)	S/2022 J 1 S/2022 J 2 S/2016 J 3 Pasithee Jupiter LXIX S/2021 J 6 S/2003 J 24 Chaldene Jupiter LXIII Isonoe S/2021 J 4 Kallichore Erinome Kale Eirene Aitne Eukelade Arche Taygete Jupiter LXXII Carme Herse Jupiter LXI Jupiter LI S/2003 J 9 Jupiter LXVI Kalyke S/2018 J 3 S/2021 J 5 S/2003 J 10
Pasiphae group (18)	Philophrosyne Eurydome Jupiter LVI S/2003 J 4 S/2016 J 4 Jupiter LXVII Hegemone Pasiphae Sponde Megaclite Cyllene Sinope Jupiter LIX Aoede Autonoe Callirrhoe S/2003 J 23 Kore
See also	Rings of Jupiter Jupiter's moons in fiction
Category

See also

References

External links