category B

This term is defined in ECSS-E-ST-50-01C as
category of spacecraft having an altitude above the Earth’s surface equal to, or greater than 2 × 106 km

This term is defined in ECSS-E-ST-50-02C as
category of those spacecraft having an altitude above the Earth’s surface equal to, or greater than, 2 x 106 km

This term is defined in ECSS-E-ST-50-05C Rev. 2 as
category of spacecraft having an altitude above the Earth’s surface of equal to, or greater than 2 × 106 km