Completion of long-term astrometric plate series yields revised results on the orbits and parallaxes. The subdwarf mu Cassiopeiae seems to be overluminous; the distance of the supergiant epsilon Aurigae is near 600 pc. The unresolved companion in the red dwarf pair BD +6398-degrees is of very low mass, and the companion of BD +67552-degrees massive but probably underluminous.