Lysithea (moon)

Lysithea
Discovery
Discovered by	S. B. Nicholson
Discovery date	July 6, 1938
Designations
Adjectives	Lysithean
Orbital characteristics
Mean orbit radius	11,720,000 km
Eccentricity	0.11
Orbital period	259.20 d (0.69 a)
Average orbital speed	3.29 km/s
Inclination	28.30° (to the ecliptic); 25.77° (to Jupiter's equator)
Satellite of	Jupiter
Physical characteristics
Mean radius	18 km
Surface area	~4100 km2
Volume	~24,400 km3
Mass	6.3×1016 kg
Mean density	2.6 g/cm3 (assumed)
Surface gravity	~0.013 m/s2 (0.001 g)
Escape velocity	~0.022 km/s
Albedo	0.04 (assumed)
Temperature	~124 K

Lysithea (/laɪˈsɪθiə/ ly-SITH-ee-ə, /liˈsɪθiə/ li-SITH-ee-ə; Greek: Λυσιθέα) is a prograde non-spherical moon of Jupiter. It was found 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.^[4]

Lysithea did not get its present name until 1975; before then, it was simply known as Jupiter X. It was sometimes called "Demeter"^[5] from 1955 to 1975.

It belongs to the Himalia group, five moons orbiting between 11,000,000 and 13,000,000 km from Jupiter at an inclination of about 28.3°.^[2] Its orbital elements are as of January 2000. They are changing a lot due to Solar and planetary perturbations.

References[change | change source]

↑ ^1.0 ^1.1 Nicholson, S. B. (October 1938). "Two New Satellites of Jupiter". Publications of the Astronomical Society of the Pacific. 50 (297): 292–293. Bibcode:1938PASP...50..292N. doi:10.1086/124963. S2CID 120216615.
↑ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 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. S2CID 120372170.
↑ ^3.0 ^3.1 ^3.2 "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). Retrieved 2008-12-12.
↑ Marsden, B. G. (7 October 1974). "Satellites of Jupiter". IAUC Circular. 2846.
↑ Payne-Gaposchkin, Cecilia; Katherine Haramundanis (1970). Introduction to Astronomy. Englewood Cliffs, N.J.: Prentice-Hall. ISBN 0-134-78107-4.

Other websites[change | change source]

Lysithea Profile Archived 2015-08-03 at the Wayback Machine by NASA's Solar System Exploration
David Jewitt pages
Scott Sheppard pages

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[Nicholson_1938-1] 1.0 ^1.1 Nicholson, S. B. (October 1938). "Two New Satellites of Jupiter". Publications of the Astronomical Society of the Pacific. 50 (297): 292–293. Bibcode:1938PASP...50..292N. doi:10.1086/124963. S2CID 120216615.

[Jacobson_2000-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 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. S2CID 120372170.

[jplssd-3] 3.0 ^3.1 ^3.2 "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). Retrieved 2008-12-12.

[IAUC_2846-4] Marsden, B. G. (7 October 1974). "Satellites of Jupiter". IAUC Circular. 2846.

[Gaposchkin-5] Payne-Gaposchkin, Cecilia; Katherine Haramundanis (1970). Introduction to Astronomy. Englewood Cliffs, N.J.: Prentice-Hall. ISBN 0-134-78107-4.

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v t e Moons of Jupiter
Listed in increasing approximate distance from Jupiter
Inner moons (4)	Metis Adrastea Amalthea Thebe
Galilean moons (4)	Io Europa Ganymede Callisto
Themisto group (1)	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 group (1)	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
Pasiphaë group (18)	Philophrosyne Eurydome Jupiter LVI S/2003 J 4 S/2016 J 4 Jupiter LXVII Hegemone Pasiphaë Sponde Megaclite Cyllene Sinope Jupiter LIX Aoede Autonoe Callirrhoe S/2003 J 23 Kore
Related page	Rings of Jupiter
Category