Eris
136199 Eris (2003 UB313)
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Mean radius
- 1,200 km
- Equatorial radius
- 1,200 km
- Mass
- 16,600 × 10²⁴ kg
- Density
- 2.3 g/cm³
- Surface gravity
- 0.77 m/s²
- Escape velocity
- 1.36 km/s
- Rotation period
- 1.079 days
- Orbital period
- 557.56 years
- Albedo
- 0.84
- Absolute magnitude V(1,0)
- -1.1 mag
- Absolute magnitude H
- -1.26 mag
Source:NASA JPL Solar System Dynamics · checked 2026-11-02 ↗NASA JPL Small-Body Database · checked 2026-11-02 ↗
Orbit
- Orbit class (JPL)
- TNO — TransNeptunian Object
- Semi-major axis
- 67.9 AU
- Eccentricity
- 0.438
- Inclination
- 43.9°
- Perihelion distance
- 38.2 AU
- Aphelion distance
- 97.7 AU
- Orbital period
- 205,000 days
- Perihelion passage
- JD 2545407.717
- Earth MOID
- 37.2 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- Its diameter is about 19% of Earth's (radius 1,200 km ÷ Earth's 6,371 km).
- One orbit takes about 205,000 Earth days (about 561.3 years).
- Sunlight needs about 9.4 hours to reach it on average (semi-major axis 67.9 AU) — versus about 8 min 19 s to Earth.