The Orbit of Charon Is Circular

  title={The Orbit of Charon Is Circular},
  author={Marc W. Buie and David J. Tholen and William M. Grundy},
We present a detailed analysis of the orbit of Charon where we show its orbit to be circular. This analysis explores the effects of surface albedo variations on the astrometry and the resulting errors in the orbital elements. We present two new epochs of data from the Hubble Space Telescope taken in 2008 and 2010 and combine that with a re-analysis of previously published data from 1992 and 2002. Our adopted two-body Keplerian orbital elements for Charon are P = 6.3872273 ± 0.0000003 days, a… CONTINUE READING
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