- Distance from Earth now
- 35.23 AU (5.27 billion km)
- Distance from the Sun now
- 35.61 AU (5.33 billion km)
- Light time from Earth
- 4 h 53 min
- Mean radius
- 1,188.3 km (0.187 × Earth)
- Mass
- 1.303 × 10^22 kg
- Surface gravity
- 0.62 m/s² (0.06 g)
- Escape velocity
- 1.2 km/s
- Rotation period
- 6.39 days
- Year (orbit around the Sun)
- 247.94 years (90,560 days)
- Average distance (semi-major axis)
- 39.48 AU (5.91 billion km)
- Orbital eccentricity
- 0.2479
- Inclination to the ecliptic
- 17.17°
- Next closest approach to Earth
- 26 July 2027 — 34.81 AU (5.21 billion km)
Positions from NASA JPL Horizons; physical constants from the IAU and JPL. Distances are centre to centre.