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Stern, S. A.; Mutchler, M. J.; Weaver, H. A.; Steffl, A. J. (2006). "The Positions, Colors, and Photometric Variability of Pluto's Small Satellites from HST Observations 2005–2006". Astronomical Journal. 132 (3): 1405–1414. arXiv:astro-ph/0605014. Bibcode: 2006AJ....132.1405S. doi:10.1086/506347.
Buie, Marc W.; Grundy, William M.; Young, Eliot F.; Young, Leslie A.; Stern, S. Alan (2006). "Orbits and Photometry of Pluto's Satellites: Charon, S/2005 P1, and S/2005 P2". The Astronomical Journal. 132 (1): 290–298. arXiv:astro-ph/0512491. Bibcode: 2006AJ....132..290B. doi:10.1086/504422.. a, i, e per JPL (site updated 2008 Aug 25)
Stern, S. A.; Mutchler, M. J.; Weaver, H. A.; Steffl, A. J. (2006). "The Positions, Colors, and Photometric Variability of Pluto's Small Satellites from HST Observations 2005–2006". Astronomical Journal. 132 (3): 1405–1414. arXiv:astro-ph/0605014. Bibcode: 2006AJ....132.1405S. doi:10.1086/506347.
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