Leda (Moon)

Leda
	Discovery image of Leda taken by the Palomar Observatory in 1974
Discovery
Discovered by	Charles T. Kowal
Discovery site	Palomar Observatory
Discovery date	14 September 1974
Designations
Designation	Jupiter XIII
Pronunciation	/ˈliːdə/
Named after	Λήδα Lēdā
Adjectives	Ledian /ˈliːdiən/, Ledean /ˈliːdiən/ or /liːˈdiːən/
Orbital characteristics
	Epoch 16 February 2017 (JD 2457800.5)
Observation arc	42.60 yr (15,561 days)
Semi-major axis	0.0748405 astronomical unit\|AU (11,195,980 km)
Eccentricity	0.1648788
Orbital period	+242.02 d
Mean anomaly	137.02571°
Mean motion	1° 29m 14.953s / day
Inclination	27.63631° (to ecliptic)
Longitude of ascending node	190.18497°
\|{{{apsis}}}\|helion}}	312.92965°
Satellite of	Jupiter
Group	Himalia group
Physical characteristics
Mean diameter	21.5±1.7 km
Albedo	0.034±0.006
Apparent magnitude	20.2
Absolute magnitude (H)	12.7

Short description: Outer moon of Jupiter

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]^[9] It was named after Leda, who was raped^[10] 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.^[11]

Leda belongs to the Himalia group, moons orbiting between 11 and 13 Gm from Jupiter at an inclination of about 27.5°.^[12] The orbital elements given here are as of January 2021, but they are continuously changing due to solar and planetary perturbations.

Single-exposure image of Leda by the Wide-field Infrared Survey Explorer (WISE) spacecraft in 2010

References

↑ ^1.0 ^1.1 Kowal, C. T.; Aksnes, K.; Marsden, B. G.; Roemer, E. (1974). "Thirteenth satellite of Jupiter". Astronomical Journal 80: 460–464. doi:10.1086/111766. Bibcode: 1975AJ.....80..460K. http://adsabs.harvard.edu//full/seri/AJ.../0080//0000460.000.html.
↑ "Leda". Leda. Oxford University Press. http://www.lexico.com/definition/Leda.
↑ 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
↑ ^6.0 ^6.1 "M.P.C. 128893". Minor Planet Circular. Minor Planet Center. 27 January 2021. https://minorplanetcenter.net/iau/ECS/MPCArchive/2021/MPC_20210127.pdf.
↑ ^7.0 ^7.1 Grav, T.Expression error: Unrecognized word "etal". (August 2015). "NEOWISE: Observations of the Irregular Satellites of Jupiter and Saturn". The Astrophysical Journal 809 (1): 9. doi:10.1088/0004-637X/809/1/3. 3. Bibcode: 2015ApJ...809....3G. https://authors.library.caltech.edu/61254/1/Grav_2015.pdf.
↑ Sheppard, Scott. "Scott S. Sheppard - Jupiter Moons". Department of Terrestrial Magnetism. Carnegie Institution for Science. https://sites.google.com/carnegiescience.edu/sheppard/moons/jupitermoons.
↑ Brian G. Marsden (September 20, 1974). "IAUC 2702: Probable New Satellite of Jupiter". International Astronomical Union. http://www.cbat.eps.harvard.edu/iauc/02700/02702.html.
↑ Leda and the Swan
↑ Marsden, Brian G. (October 7, 1975). "Satellites of Jupiter". International Astronomical Union. http://www.cbat.eps.harvard.edu/iauc/02800/02846.html.
↑ Jacobson, R. A. (2000). "The orbits of outer Jovian satellites". Astronomical Journal 120 (5): 2679–2686. doi:10.1086/316817. Bibcode: 2000AJ....120.2679J. https://trs.jpl.nasa.gov/bitstream/2014/15175/1/00-1187.pdf.

External links

Leda Overview by NASA's Solar System Exploration
David Jewitt pages
Jupiter's Known Satellites (by Scott S. Sheppard)

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[Kowal1974-1] 1.0 ^1.1 Kowal, C. T.; Aksnes, K.; Marsden, B. G.; Roemer, E. (1974). "Thirteenth satellite of Jupiter". Astronomical Journal 80: 460–464. doi:10.1086/111766. Bibcode: 1975AJ.....80..460K. http://adsabs.harvard.edu//full/seri/AJ.../0080//0000460.000.html.

[2] "Leda". Leda. Oxford University Press. http://www.lexico.com/definition/Leda.

[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

[MPC128893-6] 6.0 ^6.1 "M.P.C. 128893". Minor Planet Circular. Minor Planet Center. 27 January 2021. https://minorplanetcenter.net/iau/ECS/MPCArchive/2021/MPC_20210127.pdf.

[Grav2015-7] 7.0 ^7.1 Grav, T.Expression error: Unrecognized word "etal". (August 2015). "NEOWISE: Observations of the Irregular Satellites of Jupiter and Saturn". The Astrophysical Journal 809 (1): 9. doi:10.1088/0004-637X/809/1/3. 3. Bibcode: 2015ApJ...809....3G. https://authors.library.caltech.edu/61254/1/Grav_2015.pdf.

[SheppardMoons-8] Sheppard, Scott. "Scott S. Sheppard - Jupiter Moons". Department of Terrestrial Magnetism. Carnegie Institution for Science. https://sites.google.com/carnegiescience.edu/sheppard/moons/jupitermoons.

[IAUC_2702-9] Brian G. Marsden (September 20, 1974). "IAUC 2702: Probable New Satellite of Jupiter". International Astronomical Union. http://www.cbat.eps.harvard.edu/iauc/02700/02702.html.

[10] Leda and the Swan

[IAUC_2846-11] Marsden, Brian G. (October 7, 1975). "Satellites of Jupiter". International Astronomical Union. http://www.cbat.eps.harvard.edu/iauc/02800/02846.html.

[Jacobson_2000-12] Jacobson, R. A. (2000). "The orbits of outer Jovian satellites". Astronomical Journal 120 (5): 2679–2686. doi:10.1086/316817. Bibcode: 2000AJ....120.2679J. https://trs.jpl.nasa.gov/bitstream/2014/15175/1/00-1187.pdf.

v t e Moons of Jupiter
Listed in approximately increasing distance from Jupiter. Provisional designations in italics.
Inner moons	Metis Adrastea Amalthea Thebe
Galilean moons	Io Europa Ganymede Callisto
Themisto group	Themisto
Himalia group	Leda Himalia Ersa Pandia Lysithea Elara Dia
Carpo group	Carpo
Valetudo group	Valetudo
Ananke group	S/2003 J 12(?) Euporie Eupheme Jupiter LV Jupiter LII Thelxinoe Euanthe Helike Orthosie Jupiter LXVIII Jupiter LIV Jupiter LXIV Iocaste S/2003 J 16(?) Praxidike Harpalyke Mneme Hermippe Thyone Jupiter LXX Ananke
Carme group	Jupiter LXXII Herse Aitne Kale Taygete Jupiter LXI Chaldene S/2003 J 10(?) Erinome Kallichore Jupiter LXVI Jupiter LXIX Kalyke Carme Jupiter LXIII Pasithee Jupiter LI Eukelade Arche Isonoe S/2003 J 9(?) Eirene
Pasiphae group	Jupiter LXVII Philophrosyne S/2003 J 23(?) Aoede Callirrhoe Eurydome Kore Cyllene Jupiter LVI Jupiter LIX S/2003 J 4(?) Pasiphae Hegemone Sinope Sponde Autonoe Megaclite S/2003 J 2(?)
Rings of Jupiter In fiction

Leda (Moon)

See also

References

External links