Editing Pluto (section)

== Notes ==
{{notelist| notes =

{{efn| name = Surface area| Surface area derived from the radius ''r'': <math>4\pi r^2</math>.}}

{{efn| name = Volume| Volume ''v'' derived from the radius ''r'': <math>4\pi r^3/3</math>.}}

{{efn| name = Surface gravity| Surface gravity derived from the mass ''M'', the [[gravitational constant]] ''G'' and the radius ''r'': <math>GM/r^2</math>.}}

{{efn| name = Escape velocity| Escape velocity derived from the mass ''M'', the [[gravitational constant]] ''G'' and the radius ''r'': <math>\sqrt{2GM/r}</math>.}}

{{efn| name = Angular size| Based on geometry of minimum and maximum distance from Earth and Pluto radius in the factsheet}}

{{efn| name = wiki-kbo| The dwarf planet [[Eris (dwarf planet)|Eris]] is roughly the same size as Pluto, about 2330&nbsp;km; Eris is 28% more massive than Pluto. Eris is a [[scattered-disc object]], often considered a distinct population from Kuiper-belt objects like Pluto; Pluto is the largest body in the Kuiper belt proper, which excludes the scattered-disc objects.}}

{{efn| name = Perihelion| 1 = The discovery of Charon in 1978 allowed astronomers to accurately calculate the mass of the Plutonian system. But it did not indicate the two bodies' individual masses, which could only be estimated after other moons of Pluto were discovered in late 2005. As a result, because Pluto came to perihelion in 1989, most Pluto perihelion date estimates are based on the Pluto–Charon [[barycenter]]. Charon came to perihelion [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=mb&sstr=901 4 September 1989.] The Pluto–Charon barycenter came to perihelion [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=mb&sstr=9 5 September 1989.] Pluto came to perihelion [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=mb&sstr=999 8 September 1989.]}}

<!--{{efn| name = TNOs| Astronomers do not expect to find an object larger than Pluto closer than 100 AU from the Sun (see [[#Origins|Origins]]).<ref name="Sheppard2011" /> Of the 1687 [[TNOs]] known, {{Plain link|url = http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;ast_orbit_class=TNO;OBJ_field=0;ORB_field=0;c1_group=ORB;c1_item=Bi;c1_op=%3E;c1_value = 30.1;table_format=HTML;max_rows=100;format_option = comp;c_fields=AcBhBgBjBiBnBsCjCpAi;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query = 1&c_sort=AiA 1471}} of them have [[Apsis|perihelion]] further out than Neptune (30.1 AU).}}-->
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