Earth - Sun distance 149.6x109 m
Mass of the Earth 5.9742x1024 kg
Earth angular momentum
![Earth Sun system Earth Sun system](/media/stories/problems/classicalmechanics/earth_angular_momentum001.gif)
For an orbit, angular momentum is conserved, and this leads to one of Kepler's laws. For a circular orbit, angular momentum is
![angular momentum angular momentum](/media/stories/problems/classicalmechanics/earth_angular_momentum002.gif)
The average angular momentum is mvr, treating the Earth as if it were a point mass.
Mean distance from Earth to Sun is 149.6×106 km (8.31 minutes at the speed of light)
Mass of the Earth is 5.9742×1024 kg
Earth takes 365 days to go one complete circle around Sun.
![velocity velocity](/media/stories/problems/classicalmechanics/earth_angular_momentum003.gif)
![velocity velocity](/media/stories/problems/classicalmechanics/earth_angular_momentum004.gif)
![velocity velocity](/media/stories/problems/classicalmechanics/earth_angular_momentum005.gif)
![velocity velocity](/media/stories/problems/classicalmechanics/earth_angular_momentum006.gif)
Average angular momentum
![angular momentum angular momentum](/media/stories/problems/classicalmechanics/earth_angular_momentum007.gif)
![angular momentum angular momentum](/media/stories/problems/classicalmechanics/earth_angular_momentum008.gif)
![angular momentum angular momentum](/media/stories/problems/classicalmechanics/earth_angular_momentum009.gif)
Earth angular momentum is 2.663x1040 kgm2s-1
There is no special name for this combination of units. The direction of the vector is perpendicular to the orbit.