Classes of the solar wind interactions in the solar system

This short note classifies the interactions between different objects in the solar system and their environments with the solar wind or magnetospheric plasma. The classification is performed using a simple but physically justified M-B diagram, where M is the total mass of the neutral gas around the object and B is the magnetic field (either intrinsic or external) at the object. The solar system objects form groups within the diagram that correspond to the following general classes: magnetospheres, mini-magnetospheres, induced magnetospheres, cometary and Moon-like interactions. The Martian magnetic anomalies are unique objects. We also identify a class termed as combined magnetospheres, which does not contain any objects that meet the present conditions.