archive / atlas record
Eris
A distant world comparable in mass to Pluto.
- classification
- Dwarf planet
- system
- Scattered disc
Eris is a highly reflective dwarf planet on an elongated, inclined orbit far beyond Neptune.
- Class
- Dwarf planet
- Location / system
- Scattered disc
- Distance
- Trans-Neptunian orbit
Only values with an established scientific consensus are listed. Where a quantity is uncertain or model-dependent, it is discussed in the sections below rather than stated as data.
Overview (starter entry, expanded review pending)
Eris is a highly reflective dwarf planet on an elongated, inclined orbit far beyond Neptune.
Imaging, spectra and orbital dynamics
Eris's surface or atmosphere is constrained by telescopic and spacecraft imaging where available; spectra identify materials, while repeated position measurements establish its orbit and system context.
- What remains least constrained about Eris?Composition, internal structure, formation history or local environment can require different observations and may remain model-dependent.
Items above are unresolved. Hypotheses are labelled as such and are not presented as confirmed findings.
NASA // verified 28 September 2026
NASA/JPL // verified 28 September 2026