Mean radius and shape of Pluto and Charon from New Horizons images

  title={Mean radius and shape of Pluto and Charon from New Horizons images},
  author={Francis Nimmo and O. M. Umurhan and Carey M. Lisse and Carver J. Bierson and Tod R. Lauer and Marc W. Buie and H. B. Throop and Joshua A. Kammer and James Henry Roberts and William B. McKinnon and Amanda M. Zangari and Jeffrey M. Moore and S. Alan Stern and Leslie A. Young and H. Weaver and Cathy B. Olkin and Kimberly Ennico and The New Horizons Team},
Approach images taken by the LORRI imaging system during the New Horizons spacecraft encounter have been used to determine the mean radii and shapes of Pluto and Charon. The primary observations are limb locations derived using three independent approaches. The resulting mean radii of Pluto and Charon are 1188.3 ± 1.6 km and 606.0 ± 1.0 km, respectively (2-σ). The corresponding densities are 1854 ± 11 kg/m3 and 1701 ± 33 kg/m3 (2-σ). The Charon radius value is consistent with previous Earth… Expand

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