m, the gravitational constant G and the radius r: Gm/r2{\displaystyle Gm/r^{2}}.↑ Escape velocity derived from the mass m, the gravitational constant G and the radius r: √2Gm/r.↑ Based on the orientation of Charon's orbit, which is assumed the same as Pluto's spin axis due to the mutual tidal locking.↑ Based on geometry of minimum and maximum distance from Earth and Pluto radius in the factsheetමූලාශ්‍ර[සංස්කරණය]↑ Seligman, Courtney. "Rotation Period and Day Length". සම්ප්‍රවේශය 2009-08-13.↑ 2.0 2.1 2.2 2.3 2.4 2.5 M. W. Buie, W. M. Grundy, E. F. Young, L. A. Young, S. A. Stern (2006). "Orbits and photometry of Pluto's satellites: Charon, S/2005 P1, and S/2005 P2". Astronomical Journal. 132: 290. doi:10.1086/504422. arXiv:astro-ph/0512491.{{cite journal}}:  CS1 maint: multiple names: authors list (link)↑ Calvin J. Hamilton (2006-02-12). "Dwarf Planet Pluto". Views of the Solar System. සම්ප්‍රවේශය 2007-01-10.↑ 4.0 4.1 4.2 4.3 4.4 D. R. Williams (Sept