It is likely not technically feasible to achieve this level of pointing precision in a CubeSat in the near future, however there is a lot of promising work in this field. One CubeSat components manufacturer, for example, is offering a CubeSat bus that claims +/- 0.002 degree (34.9 microradian) pointing accuracy with 1 arc second stability [http://bluecanyontech.com/wp-content/uploads/2015/05/XB1-Data-Sheet_1.0.pdf]. | It is likely not technically feasible to achieve this level of pointing precision in a CubeSat in the near future, however there is a lot of promising work in this field. One CubeSat components manufacturer, for example, is offering a CubeSat bus that claims +/- 0.002 degree (34.9 microradian) pointing accuracy with 1 arc second stability [http://bluecanyontech.com/wp-content/uploads/2015/05/XB1-Data-Sheet_1.0.pdf]. |