Where is it now
- Distance from Sun
- 0.998 AU
- True anomaly
- 277.47°
- As of
- 13 October 2026
Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.
Orbital elements
- Semi-major axis
- 0.003 AU
- Eccentricity
- 0.0549
- Inclination
- 5.15°
- Orbital period
- 27.3 days
- Perihelion
- 0.002 AU
- Aphelion
- 0.003 AU
- Longitude of ascending node
- 125.08°
- Argument of periapsis
- 318.15°
- Epoch · J2000
- J2000
Physical properties
- Mean radius
- 1,737 km
- Equatorial radius
- 1,738 km
- Polar radius
- 1,736 km
- Mass
- 7.346 × 10²² kg
- Density
- 3.344 g/cm³
- Rotation period
- 27.32 days
- Axial tilt
- 6.68°
- Surface gravity
- 1.62 m/s²
- Escape velocity
- 2.38 km/s
- GM
- 4,900 km³/s²
- Ellipticity
- 0.0012
- J₂ · × 10⁻⁶
- 202.7
- Moment of inertia · I/MR²
- 0.394
- Synodic period
- 29.5 days
- Mean orbital speed
- 1.02 km/s
- Black-body temperature
- 270.4 K
- Solar irradiance
- 1,361 W/m²
Visual & observation
- Geometric albedo
- 0.12
- Bond albedo
- 0.11
- V(1,0) magnitude
- -0.08
- Representative colour
- #C9C9C9
Sources
- orbital elements: JPL Solar System Dynamics — planetary satellites
- physical properties: JPL Solar System Dynamics — planetary satellites
- orbital elements: NASA Planetary Fact Sheet / JPL keplerian elements
- physical properties: NASA Planetary Fact Sheet
- visual properties: NASA Planetary Fact Sheet
- physical properties: NASA Planetary Fact Sheet
- visual properties: NASA Planetary Fact Sheet