The distance that can be traveled with this command is unknown, as the farthest the Senshi ever travel in the series is to the moon. In the Sailor Moon R movie, they teleport across part of the distance to Fiore's asteroid and fly the rest of the way, rather than instantly appearing at their destination, but the reason for this is never explained. One extra person is able to teleport with the Sailor Senshi if they are standing in the center of the circle formed by the Sailor Guardians.