Leda (moon)

Leda
Discovery
Discovered by	Charles T. Kowal
Discovery date	September 11, 1974
Designations
Designation	Jupiter XIII
Pronunciation	/ˈliːdə/
Named after	Λήδα Lēdā
Adjectives	Ledian /ˈliːdiən/, Ledean /ˈliːdiən/ or /liːˈdiːən/
Orbital characteristics
Semi-major axis	11165000 km
Eccentricity	0.164
Orbital period (sidereal)	+240.9 days
Mean anomaly	228.1°
Inclination	27.46°
Longitude of ascending node	217.1°
Argument of perihelion	272.3°
Satellite of	Jupiter
Group	Himalia group
Physical characteristics
Mean diameter	21.5±1.7 km
Mass	1.1×1016 kg[citation needed]
Mean density	2.6 g/cm3 (assumed)
Surface gravity	~0.0073 m/s2 (0.001 g)
Escape velocity	~0.012 km/s
Albedo	0.034±0.006
Temperature	~124 K
Apparent magnitude	20.2

Leda /ˈliːdə/, also known as Jupiter XIII, is a prograde irregular satellite of Jupiter. It was discovered by Charles T. Kowal at the Mount Palomar Observatory on September 14, 1974, after three nights' worth of photographic plates had been taken (September 11 through 13; Leda appears on all of them).^[1]^[8] It was named after Leda, who was raped^[9] by Zeus, the Greek equivalent of Jupiter (who came to her in the form of a swan). Kowal suggested the name and the IAU endorsed it in 1975.^[10]

Leda belongs to the Himalia group, five moons orbiting between 11 and 13 Gm from Jupiter at an inclination of about 27.5°.^[11] The orbital elements given here are as of January 2000, but they are continuously changing due to solar and planetary perturbations.

References

^ ^a ^b Kowal, C. T.; Aksnes, K.; Marsden, B. G.; Roemer, E. (1974). "Thirteenth satellite of Jupiter". Astronomical Journal. 80: 460–464. Bibcode:1975AJ.....80..460K. doi:10.1086/111766.
^ "Leda". Lexico UK English Dictionary. Oxford University Press. n.d.
^ Ken Monteith (2007) Yeats and theosophy, p. 10
^ Wit Pietrzak (2011) Myth, Language and Tradition: A Study of Yeats, Stevens, and Eliot in the Context of Heidegger's Search for Being, p. 70–72
^ R.W. Chapman (1939) Adjectives from Proper Names, p. 55
^ 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.
^ Brian G. Marsden (September 20, 1974). "IAUC 2702: Probable New Satellite of Jupiter". International Astronomical Union.
^ Leda and the Swan
^ Marsden, Brian G. (October 7, 1975). "Satellites of Jupiter". International Astronomical Union.
^ Jacobson, R. A. (2000). "The orbits of outer Jovian satellites" (PDF). Astronomical Journal. 120 (5): 2679. Bibcode:2000AJ....120.2679J. doi:10.1086/316817.

External links

[Kowal_1974-1] Kowal, C. T.; Aksnes, K.; Marsden, B. G.; Roemer, E. (1974). "Thirteenth satellite of Jupiter". Astronomical Journal. 80: 460–464. Bibcode:1975AJ.....80..460K. doi:10.1086/111766.

[2] "Leda". Lexico UK English Dictionary. Oxford University Press. n.d.

[3] Ken Monteith (2007) Yeats and theosophy, p. 10

[4] Wit Pietrzak (2011) Myth, Language and Tradition: A Study of Yeats, Stevens, and Eliot in the Context of Heidegger's Search for Being, p. 70–72

[5] R.W. Chapman (1939) Adjectives from Proper Names, p. 55

[6] S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line

[Grav2015-7] 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.

[IAUC_2702-8] Brian G. Marsden (September 20, 1974). "IAUC 2702: Probable New Satellite of Jupiter". International Astronomical Union.

[9] Leda and the Swan

[IAUC_2846-10] Marsden, Brian G. (October 7, 1975). "Satellites of Jupiter". International Astronomical Union.

[Jacobson_2000-11] Jacobson, R. A. (2000). "The orbits of outer Jovian satellites" (PDF). Astronomical Journal. 120 (5): 2679. 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