Yep you'll have no problem with the polemaster picking up sigma octanis it's just up to the user to be able to identify it and its surrounding stars. As you go through the steps with the software there is a overlay that covers sigma octanis and three other stars in its little asterism and three more near the celestial pole so it should be easy to distinguish if you have it right. Also the polemaster has a decent fov to so if your initial alignment with your tripod and mount is ok it should be pretty close .
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