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Leda (moon)

Discovered byCharles T. Kowal
Discovery dateSeptember 11, 1974[1]
Orbital characteristics
Mean orbit radius
11,160,000 km[2]
240.92 d (0.654 a)[2]
3.4 km/s
Inclination27.46° (to the ecliptic)
29.01° (to Jupiter's equator)[2]
Satellite ofJupiter
Physical characteristics
Mean radius
10 km
~1250 km2
Volume~4200 km3
Mass1.1×1016 kg
Mean density
2.6 g/cm3 (assumed)
~0.0073 m/s2 (0.001 g)
~0.012 km/s
Albedo0.04 (assumed)
Temperature~124 K

Leda (/ˈldə/ LEE-də; Greek: Λήδα), 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][4] It was named after Leda, who was raped[5] 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.[6]

Leda belongs to the Himalia group, five moons orbiting between 11 and 13 Gm from Jupiter at an inclination of about 27.5°.[2] The orbital elements given here are as of January 2000, but they are continuously changing due to solar and planetary perturbations.

In fiction

See also


  1. ^ 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.
  2. ^ a b c d e Jacobson, R. A. (2000). "The orbits of outer Jovian satellites" (PDF). Astronomical Journal. 120 (5): 2679. Bibcode:2000AJ....120.2679J. doi:10.1086/316817.
  3. ^ Calvin J. Hamilton (1997–2009). "Leda Statistics". Views of the Solar System. Retrieved October 1, 2007.
  4. ^ Brian G. Marsden (September 20, 1974). "IAUC 2702: Probable New Satellite of Jupiter". International Astronomical Union.
  5. ^ Leda and the Swan
  6. ^ Marsden, Brian G. (October 7, 1975). "Satellites of Jupiter". International Astronomical Union.

External links