Changes

|meanradius=133 km<ref name=ssdphys>"[http://ssd.jpl.nasa.gov/?sat_phys_par Planetary Satellite Physical Parameters]." [[Jet Propulsion Laboratory|JPL]], [[National Aeronautics and Space Administration|NASA]]. Retrieved June 9, 2008.</ref>

|meanradius=133 km<ref name=ssdphys>"[http://ssd.jpl.nasa.gov/?sat_phys_par Planetary Satellite Physical Parameters]." [[Jet Propulsion Laboratory|JPL]], [[National Aeronautics and Space Administration|NASA]]. Retrieved June 9, 2008.</ref>

|escapespeed=0.107 km/s<ref name=Hamilton/>

|escapespeed=0.107 km/s<ref name=Hamilton/>

|composition=Water ice and little rock<ref name=Britannica>"[http://www.britannica.com/eb/article-9041800 Hyperion]." Encyclopædia Britannica. 2008. Encyclopædia Britannica Online. 9 June 2008.</ref>

|composition=Water ice and little rock<ref name=Britannica>"[https://www.britannica.com/eb/article-9041800 Hyperion]." Encyclopædia Britannica. 2008. Encyclopædia Britannica Online. 9 June 2008.</ref>

|color=reddish rose tan

|color=reddish rose tan

|albedo=0.3<ref name=saturnsatfact/><ref name=Hamilton/><ref name=Britannica/>

|albedo=0.3<ref name=saturnsatfact/><ref name=Hamilton/><ref name=Britannica/>

[[Image:Hyperion Meri green.jpg|thumb|150px|left|Hyperion in color enhancement]]Hyperion has craters that cover its surface completely, making it spongiform in appearance.<ref name=Thomas>Thomas, P. C.; et al. (2007). "[http://www.nature.com/nature/journal/v448/n7149/abs/nature05779.html;jsessionid=8884731760421E844AF551ABA6E2527F Hyperion's sponge-like appearance]". Nature 448: 50-56. {{doi|10.1038/nature05779}}. Accessed June 9, 2008.</ref> Those craters are remarkably well preserved, primarily on account of Hyperion's low density. The largest crater on Hyperion has a diameter of 120&nbsp;km and a depth of 10&nbsp;km.<ref name=Piazza/>

[[Image:Hyperion Meri green.jpg|thumb|150px|left|Hyperion in color enhancement]]Hyperion has craters that cover its surface completely, making it spongiform in appearance.<ref name=Thomas>Thomas, P. C.; et al. (2007). "[http://www.nature.com/nature/journal/v448/n7149/abs/nature05779.html;jsessionid=8884731760421E844AF551ABA6E2527F Hyperion's sponge-like appearance]". Nature 448: 50-56. {{doi|10.1038/nature05779}}. Accessed June 9, 2008.</ref> Those craters are remarkably well preserved, primarily on account of Hyperion's low density. The largest crater on Hyperion has a diameter of 120&nbsp;km and a depth of 10&nbsp;km.<ref name=Piazza/>

Hyperion is one of the least reflective of Saturn's moons, with an albedo of 30%. Many astronomers believe that Hyperion is covered with dark material that comes from [[Phoebe]], an outer moon.<ref name=Hamilton/> Recent data from the [[Cassini-Huygens Mission|Cassini]] probe indicates that this material consists of hydrocarbons.<ref name=scidaily>NASA/Ames Research Center. "[http://www.sciencedaily.com/releases/2007/07/070705125818.htm Hydrocarbons, Necessary For Life, Found On Saturn's Moon Hyperion]." ''ScienceDaily'' 6 July 2007. Accessed 9 June 2008.</ref>

Hyperion is one of the least reflective of Saturn's moons, with an albedo of 30%. Many astronomers believe that Hyperion is covered with dark material that comes from [[Phoebe]], an outer moon.<ref name=Hamilton/> Recent data from the [[Cassini-Huygens Mission|Cassini]] probe indicates that this material consists of hydrocarbons.<ref name=scidaily>NASA/Ames Research Center. "[https://www.sciencedaily.com/releases/2007/07/070705125818.htm Hydrocarbons, Necessary For Life, Found On Saturn's Moon Hyperion]." ''ScienceDaily'' 6 July 2007. Accessed 9 June 2008.</ref>

The favorite theory of the origin of Hyperion is that it is a fragment of a larger body that suffered a collision.<ref name=Arnett/><ref name=Piazza/> At least one astronomer speculated that debris from this collision contributed to the dark material that covers the Cassini Region of [[Iapetus]].<ref name=Matthews>Matthews, Robert A. J. "[http://adsabs.harvard.edu/abs/1992QJRAS..33..253M The Darkening of Iapetus and the Origin of Hyperion]." ''Quarterly Journal of the Royal Astronomical Society'', 33:253–258, September 1992. Accessed June 9, 2008.</ref>

The favorite theory of the origin of Hyperion is that it is a fragment of a larger body that suffered a collision.<ref name=Arnett/><ref name=Piazza/> At least one astronomer speculated that debris from this collision contributed to the dark material that covers the Cassini Region of [[Iapetus]].<ref name=Matthews>Matthews, Robert A. J. "[http://adsabs.harvard.edu/abs/1992QJRAS..33..253M The Darkening of Iapetus and the Origin of Hyperion]." ''Quarterly Journal of the Royal Astronomical Society'', 33:253–258, September 1992. Accessed June 9, 2008.</ref>