The Orbits of Jupiter’s Irregular Satellites

  title={The Orbits of Jupiter’s Irregular Satellites},
  author={Maja Brozovi{\'c} and Robert A. Jacobson},
  journal={The Astronomical Journal},
We report on the improved ephemerides for the irregular Jovian satellites. We used a combination of numerically integrated equations of motion and a weighted least-squares algorithm to fit the astrometric measurements. The orbital fits for 59 satellites are summarized in terms of state vectors, post-fit residuals, and mean orbital elements. The current data set appears to be sensitive to the mass of Himalia, which is constrained to the range of GM = 0.13–0.28 km3 s−2. Here, GM is the product of… 

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