Neptune in 3D: live position and orbit

The most distant planet, invisible to the naked eye and found by calculation. Its winds reach 2,000 km/h, the fiercest in the Solar System.

Neptune is shown at its real position, computed from NASA/JPL ephemeris data. The view opens on Neptune; 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.

Equatorial radius at 1 bar

24 764 km¹

Mass

1.02 × 10²⁶ kg¹

Gravity at 1 bar

11.27 m/s²¹

Mean temperature at 1 bar

-200 °C¹

Temperature at 1 bar

72 K (-201 °C) (the main table of the same catalogue gives -200 °C, 1.15 K apart)¹

Temperature at 0.1 bar

55 K (-218 °C)¹

Density at 1 bar

0.45 kg/m³¹

Scale height

19.1 to 20.3 km¹

Mean molecular weight

2.53 to 2.69 g/mol¹

Winds

0 to 580 m/s¹

Mean distance from the Sun

30.069 AU¹

Orbital period

60 189 days¹

Sidereal rotation

16.11 hours¹

Axial tilt

28.3°¹

Known moons

16 (as of October 2026)²

Missions

• Voyager
• HST

Flybys

• August 25, 1989: Voyager 2

Sources

1. NASA NSSDCA, Planetary and Satellite Fact Sheets. read 2026-09-17. https://nssdc.gsfc.nasa.gov/planetary/planetfact.html
2. NASA Science, Neptune Moons. read 2026-09-17. https://science.nasa.gov/neptune/moons/