Mercury
👁️ Naked-eye🚀 Visited by spacecraft
📋 A written introduction is coming — for now this page shows official values only.
NowLIVE
Distance from Earth
0.6728 AU
100,647,009 km
Light travel time
5m 36s
at light speed
Computed 2026-11-03 22:44 UTC · planets astronomy-engine (VSOP87) · comets JPL elements (two-body)
Physical data
- Mean radius
- 2,439.4 km
- Equatorial radius
- 2,440.53 km
- Mass
- 0.330103 × 10²⁴ kg
- Density
- 5.4289 g/cm³
- Surface gravity
- 3.7 m/s²
- Escape velocity
- 4.25 km/s
- Rotation period
- 58.6462 days
- Orbital period
- 0.240847 years
- Albedo
- 0.106
- Absolute magnitude V(1,0)
- -0.6 mag
Source:NASA JPL Solar System Dynamics · checked 2026-11-02 ↗
Orbit
- Semi-major axis
- 0.387099 AU
- Eccentricity
- 0.205636
- Inclination
- 7.005°
Source:NASA JPL Solar System Dynamics · checked 2026-11-02 ↗
In everyday life
- Its diameter is about 38% of Earth's (radius 2,439 km ÷ Earth's 6,371 km).
- It takes about 0.2 Earth years to orbit the Sun.
- Sunlight needs about 3 minutes to reach it on average (semi-major axis 0.4 AU) — versus about 8 min 19 s to Earth.