Leda (moon)

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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
20.2 [3]

Leda or Jupiter XIII, is a prograde non-spherical moon of Jupiter. It was found 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 a lover of Zeus, the Greek equivalent of Jupiter (who came to her in the form of a swan). Kowal suggested the name and the IAU supported it in 1975.[5]

Leda belongs to the Himalia group, five moons orbiting between 11,000,000 and 13,000,000 km from Jupiter at an inclination of about 27.5°.[2] The orbital elements given here are as of January 2000, but they are changing a lot due to Solar and planetary perturbations.

References[change | change source]

  1. 1.0 1.1 Kowal, C. T. (1974). "Thirteenth satellite of Jupiter". Astronomical Journal. 80: pp. 460–464. Unknown parameter |coauthors= ignored (|author= suggested) (help); |page(s)= has extra text (help)
  2. 2.0 2.1 2.2 2.3 2.4 Jacobson, R. A. (2000). "The orbits of outer Jovian satellites". Astronomical Journal. 120: pp. 2679-2686. doi:10.1086/316817. |page(s)= has extra text (help)
  3. "Leda Statistics". Retrieved 2007-10-01.
  4. IAUC 2702: Probable New Satellite of Jupiter 1974 September 20 (discovery)
  5. Marsden, B. G. (7 October 1974). "Satellites of Jupiter". IAUC Circular. 2846.

Other websites[change | change source]