Convert ri (Japanese league) to astronomical unit
Selected category: length.
Definition and details for ri (Japanese league):
Ri is a traditional Japanese unit of distance, which is sometimes called the "Japanese league", because it is similar to the European league. One ri is equal to 12 960 shaku (one shaku equals to 10/33 m). This is about 3927 meters.
Definition and details for astronomical unit:
Astronomers use astronomical unit (ua or au or AU) as yardstick for measuring the distances between objects in the Solar System. AU is defined as the distance from the center of the Earth to the center of the Sun. Currently it is accepted that this length is 149 597 870 691 meters, with an uncertainty of about 30 meters.