Neptune
The outermost planet. Found by Johann Galle in 1846. Symbol: ♆.
Equatorial diameter
49,528 km
3.89× Earth
Mass
17.1 × Earth
Surface gravity
1.14 × Earth
Orbital period
164.8 years
Mean distance from the Sun
30.069 AU
Rotation
16.1 hours
Axial tilt
28.3°
Mean temperature
−200 °C
Moons
16
confirmed as of March 2025
My Sky
Rise, highest and set over your place, for any night: Neptune
Further info
NASA: Neptune
Wikipedia: Neptune
Source
Figures: NASA planetary fact sheets
