抄録
A lunar and planetary robot often requires its position relative to a lander during its activities. Although the lander is equipped with measuring devices such as stereo camera, the stereo camera does not work under shadowy environment. A two-point color marker is one of the resolutions to the issue. The two-point color marker is mounted on top of the solar panel of lander. The lunar and planetary robot can measure its relative position from positional relationship between the two points of the marker. The marker system is simple but measuring accuracy is expected to be high enough and it is recognizable from distant place due to its mounted position.
