Calathus is a proposed student-designed Ceres sample-return mission, that would consist of an orbiter and a lander with an ascent module. The orbiter would be equipped with a camera, a thermal imager, and a radar; the lander will have a sampling arm, a camera, and a gas chromatograph mass spectrometer. Mission objective is to return maximum 40 g of Ceresian soil. The mission was designed and proposed in 2018 with support of ESA.
Spacecraft should take samples from Occator Crater, that was studied and photographed by NASA's Dawn. The objectives are: