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Meeting	ACGS Committee Meeting 107 - Boulder - March 2011
Agenda Location	5 SUBCOMMITTEE B – MISSILES AND SPACE 5.1 Kepler Attitude Control and Determination System Overview and Early Mission Experiences
Title	Kepler Attitude Control and Determination System Overview and Early Mission Experiences
Presenter	Dustin Putnam
Affiliation	Ball Aerospace
Available Downloads*	presentation
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Abstract	Dustin Putnam Ball Aerospace Abstract The Kepler spacecraft was launched on March 7, 2009. Designed and built for NASA by Ball Aerospace & Technologies Corp., the Kepler mission uses the transit method to detect Earth-like exoplanets – approximately Earth-sized planets that are in the habitable zone of their stars. Kepler, the largest telescope ever launched beyond Earth orbit, is in a heliocentric, Earth-trailing, drift-away orbit. It is a 3-axis stabilized, inertially-fixed pointer, using a combination of sun sensors, star trackers, inertial measurement units, and fine guidance sensors for attitude determination and reaction wheels and hydrazine thrusters for attitude and momentum control. This paper presents an overview of the Kepler mission, the ADCS design and some early mission experiences.