Dwarf Planet Pluto Data

Orbital Elements

Semimajor Axis: 39.4821 AU

Eccentricity: 0.24883

Inclination: 17.14001°

Argument of Perifocus: 113.76°

Longitude of Ascending Node: 110.30°

Mean Motion: 0.003973966° per day

Time of Periapsis: 1990 Jan 13

Orbital Period: 248.0208 years

Mass: 0.00220 M_E

Equatorial Radius: 0.1805 R_E

Rotational Inclination: 120°

Rotational Period: 6.38723 days

Surface Temperature: ~ -200°C

Satellites

Satellite Name	Orbital Semimajor Axis (km)	Orbital Period (days)	Mass (kg)	Discovery
Satellite Name	Orbital Semimajor Axis (km)	Orbital Period (days)	Mass (kg)	Discoverer Name	Announcement Date
Charon¹	1.9591·10⁴	6.38723	1.59·10²¹	J. W. Christy	1978 June 22
Styx	4.2393·10⁴	20.16	7.5·10¹⁵	M. Showalter, et al	2012 July 11
Nix	4.8671·10⁴	24.85	5·10¹⁶	A. Stern, et al	2005 Oct 31
Kerberos	5.7729·10⁴	32.17	1.6·10¹⁶	M. Showalter, et al	2011 July 20
Hydra	6.4698·10⁴	38.20	5·10¹⁶	A. Stern, et al	2005 Oct 31

Charon would be classified a dwarf planet if it were not a satellite of Pluto.

1 AU = 1.49597870691·10¹¹ m 1 year = 365.25 days = 31557600 s
1 M_E = 5.9742·10²⁴ kg 1 R_E = 6.378136·10⁶ m

The URL of this page is: http://www.princeton.edu/~willman/planetary_systems/Sol/Pluto

This page was last updated: 2020 October 2

You may contact Alex at: willman@Princeton.EDU

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