The mission's primary objective is to flight-test solar electric primary propulsion on a Moon voyage. Another objective is to test new technologies for spacecraft and instruments. The spacecraft will also carry out a complete program of scientific observations in lunar orbit.
			Small Missions for Advanced Research in Technology.
	Type		The three-axis stabilised spacecraft using the most modern technologies, avionics and software.
	Mass		350 kg including 15 kg of science payload and 72 kg of Xenon propellant.
	Size		Spacecraft body is a cube of 1 m side, 14 m from tip-to-tip of the solar arrays deployed.
	Solar Electric Propulsion		Stationary Plasma Hall-effect thruster uses xenon gas as propellant and the power from the spacecraft's solar arrays. The thruster will provide a thrust of some 70 milliNewtons.
	OBAN		It is a part of a study on `Autonomous Onboard Navigation for Interplanetary Missions', of ESA's Technology and Research Programme managed by Finn Ankersen, Guidance, Navigation and Control analyst at ESTEC, Noordwijk, in co-operation with J.Fertig, ESOC in Darmstadt, Germany
	D-CIXS		Demonstration of a Compact Imaging X-ray Spectrometer is an innovative instrument designed for high throughput X-ray spectroscopy. Principal Investigator Dr Manuel Grande, Rutherford Appleton Laboratory, UK. Co-Investigator is Juhani Huovenin, University of Helsinki Observatory, Finland
	Laser-Link Experiment		will allow the study of the effects of laser beam passing through different air masses and with the target spacecraft at varying distances from Earth. It is being conducted by ESA's Directorate of Technical Operations Support at ESTEC and the experiment's Technology Investigator is Zoran Sodnik.
	EPDP/SPEDE		Both experiments (Electric Propulsion Diagnostic Package and Spacecraft Potential, EPlectron and Dust Experiment) are devoted to monitoring how well the solar electric propulsion functions in space and to observe all its consequences. LABEN/PROEL (Florence, Italy), FMI, Helsinki, Finland.
	SIR		Smart-1 Infrared Spectrometer will perform IR spectroscopy of the lunar surface. The SIR is being provided by a consortium led by the Max Planck Institute fur Aeronomie, Garching Germany.
	KaTE		Ka-band Telemetry and Telecommand Experiment objectives are to validate new digital communications technology, to test the new range of communication frequencies in the X-band and Ka-band, to test new data encoding techniques and to validate the corresponding ground-based infrastructure. ESTEC, in conjunction with Dornier Satellitensysteme GmbH, Ottobrunn, Germany.
	AMIE		Asteroid-Moon Micro-Imager Experiment is a micro-imager of remarkably compact design that weighs but 450 grams. It has been developed by the Centre Suisse d'Electronique et de Microtechnique in Neuchatel, Switzerland.
	Date		Kourou, French Guiana, October 2002
	Vehicle		Ariane-5
			Progressively expanding orbit using the solar electric propulsion, spiralling out from Earth until the spacecraft is caught by the Moon's gravitational field. About 9 months after the launch, the spacecraft will be inserted into a lunar orbit with the perigee of 2,738 km, apogee of 11,738 km, and inclination of 90°. For the following 21 days, the trajectory is lowered, by means of the solar electric propulsion engine, to the final orbit with the perigee of 1,000 km, apogee of 10,000 km, inclination of 90°, and orbital period of 15 hours. Then the lunar overall nominal observation phase begins, lasting six months, during which the Moon will be monitored from more than 200 orbits.
			During its operational time (9 months cruise to the Moon and 6 months operations in lunar orbit), the satellite will be controlled from the European Space Operations Centre, ESOC, in Darmstadt Germany. There the Mission Operations Centre (S1MOC) will be the primary interface with the spacecraft via ESA's ground station network.