===> How far is Neptune from the sun

Neptune

 The mean distance between Neptune and the sun is 2,798,800,000 mi. (4,504,300,000 km).

Source: WorldBook

Neptune

The semimajor axis of Neptune is 4,514.953 (106 km).

The perihelion of Neptune is 4,471.050 (106 km).

The aphelion of Neptune is 4,558.857 (106 km).

Source: Planetary Sciences at the National Space Science Data Center