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Big sattellites of planets have approapriate revolution radii compared with revolution periods for inverse biquadrate forces.


Name
Diameter
(km,sq)[note 1]
Mass
(×1016 kg,sq)
Semi-major axis
(km,sq)[1]
Orbital period
(d,sq)[1][note 2]
Diameter
(km,biq)
Semi-major axis
(km,biq)
Orbital period
(d,biq)
Earth 1.000 12,756 384,000 27.3 12,756 3,663,360 27.3
Io 0.4022 3,660.0×3,637.4
×3,630.6
8,900,000 421,700 +1.769 137 786 1,472.05 169,607.7
Europa 0.4022 3,121.6 4,800,000 671,034 +3.551 181 041 1,255.5 269,889.9
Ganymede 0.4022 5,262.4 15,000,000 1,070,412 +7.154 552 96 2,116.54 430,519.7
Callisto 0.4022 4,820.6 11,000,000 1,882,709 +16.689 018 4 1.938.85 757,225.6
Rhea 0.3361 1529 (1535×1525×1526) 2306.518 ± 0.353 527 108 +4.518 212 513.9 177,161.0
Titan 0.3361 5151 134520 ± 20 1 221 930 +15.945 42 1,731.251 410,690.7
Triton 0.2307


referencesEdit

  1. 1.0 1.1 "Natural Satellites Ephemeris Service". "Note: some semi-major axis were computed using the µ value, while the eccentricities were taken using the inclination to the local Laplace plane" 
  1. Diameters with multiple entries such as "60×40×34" reflect that the body is not a perfect spheroid and that each of its dimensions have been measured well enough.
  2. Periods with negative values are retrograde.

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