Mercury in 3D: live position and orbit

The smallest planet and the closest to the Sun. With no atmosphere, it swings from +430 °C by day to -180 °C at night.

Mercury is shown at its real position, computed from NASA/JPL ephemeris data. The view opens on Mercury; you can travel in time, switch between the educational overview and the true-scale voyage, and compare it with every other body of the solar system.

Radius

2 440 km¹

Mass

3.30 × 10²³ kg¹

Surface gravity

3.70 m/s²¹

Mean temperature

167 °C¹

Mean distance from the Sun

0.387 AU¹

Orbital period

88 days¹

Sidereal rotation

59 days¹

Axial tilt

0.0°¹

Known moons

0 (as of January 2024)¹

Missions

• Mariner 10
• HST
• MErcury Surface, Space ENvironment, GEochemistry, and Ranging
• BepiColombo

Flybys

• October 1, 2021: BepiColombo
• June 23, 2022: BepiColombo
• June 19, 2023: BepiColombo
• September 4, 2024: BepiColombo
• December 1, 2024: BepiColombo
• January 8, 2025: BepiColombo

Sources

1. NASA NSSDCA, Planetary and Satellite Fact Sheets. read 2026-09-17. https://nssdc.gsfc.nasa.gov/planetary/planetfact.html