LunARSat, the Lunar Academic and Research Satellite, is an ESA micro-spacecraft that will be sent into an orbit around the Moon to perform scientific investigations concerning the lunar environment and its characteristics.This proposal is the DTU response to the Technical University of Münich request for proposal (r.f.p.) for the LunARSat star tracker.The Advanced Stellar Compass (ASC) is a highly advanced and autonomous Stellar Reference Unit designed, developed and produced by the Space Instrumentation Group of the Department of Automation of the Technical University of Denmark.The document is structured as follows. First we present the ASC - heritage, system description, performance and the calibration procedures. In section 3 the mechanical and electrical interfaces are given. In section 4 and 5 we address issues like manufacturing, transportation and storage and to conclude, in sect. 6, we address the financial issues.