Published online by Cambridge University Press: 15 February 2011
We report the results of performance evaluation of the first Japanese astrometrysatellite, Nano-JASMINE. It is a very small satellite and weighs only 35 kg. It aims tocarry out astrometry measurement of nearby bright stars (z ≤ 7.5 mag) withan accuracy of 3 milli-arcseconds. Nano-JASMINE will be launched by Cyclone-4 rocket inAugust 2011 from Brazil. The current status is in the process of evaluating theperformances. A series of performance tests and numerical analysis were conducted. As aresult, the engineering model (EM) of the telescope was measured to be achieving adiffraction-limited performance and confirmed that it has enough performance forscientific astrometry.