Dwarf Planet Eris Data


Image courtesy of W. M. Keck Observatory

Orbital Elements
Semimajor Axis:67.67 AU
Eccentricity:0.44177
Inclination:44.187°
Argument of Perifocus:151.4305°
Longitude of Ascending Node:35.8696°
Mean Motion:0.00177° per day
Time of Periapsis:2256 Feb 27
Orbital Period:557.2 years
Mass:0.00278 ME
Equatorial Radius:0.19 RE
Rotational Inclination:?
Rotational Period:~8 hours
Surface Temperature:~ -230°C

Satellites

Satellite Name Orbital Semimajor Axis (km) Orbital Period (days) Mass (kg) Discovery
Discoverer NameAnnouncement Date
Dysnomia 3.74·10415.774? M. Brown, et al.2005 Sep 18

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


The URL of this page is: http://www.princeton.edu/~willman/planetary_systems/Sol/Eris
This page was last updated: 2007 June 21
You may contact Alex at: willman@Princeton.EDU

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