- Distance from Earth now
- 18.84 AU (2.82 billion km)
- Distance from the Sun now
- 19.44 AU (2.91 billion km)
- Light time from Earth
- 2 h 37 min
- Mean radius
- 25,362 km (3.981 × Earth)
- Mass
- 8.681 × 10^25 kg
- Surface gravity
- 9.01 m/s² (0.92 g)
- Escape velocity
- 21.4 km/s
- Rotation period
- 17.2 hours (retrograde)
- Year (orbit around the Sun)
- 84.02 years (30,689 days)
- Average distance (semi-major axis)
- 19.19 AU (2.87 billion km)
- Orbital eccentricity
- 0.0475
- Inclination to the ecliptic
- 0.77°
- Next closest approach to Earth
- 25 November 2026 — 18.44 AU (2.76 billion km)
Positions from NASA JPL Horizons; physical constants from the IAU and JPL. Distances are centre to centre.