MASCOT (mobile asteroid surface scout) is a highly-integrated asteroid lander whose development was co-ordinated by DLR scientists collaborating with the French space agency CNES and the Japanese space authority JAXA. Weighing nearly ten kilograms, the lander has room for around three kilos of payload. Weighing 450 grams, its structure is extremely light and stiff at the same time. This has been achieved by using special CFRP layers no more than 0.125 millimetres thick and combining them into an appropriate framework structure with a foam core or in laminate form. In 2014, MASCOT is to set out for the dwarf planet 1999 JU3 on board the Japanese space probe Hayabusa 2. The space probe is scheduled to arrive in mid-2018 to gather rock samples and bring them back to Earth. The MASCOT mobile lander will support the orbiter in its search for a suitable landing site that is scientifically interesting. Moreover, MASCOT itself will carry out experiments on 1999 JU3.