mu Cep hitorical observations (see vsnet-obs 31780) source: 1968AJ.....73...20C COYNE G.V. and KRUSZEWSKI A. Astron. J., 73, 20 (1968) Wavelength dependence of polarization. XI. mu Cephei. object YYYYMMDD(UT) mag code CEPmu 19651018.14 4.07V COY CEPmu 19651018.14 6.41B COY CEPmu 19660908.17 4.01V COY CEPmu 19660908.17 6.36B COY CEPmu 19660923.24 4.06V COY CEPmu 19660923.24 6.41B COY CEPmu 19661009.20 4.09V COY CEPmu 19661009.20 6.45B COY CEPmu 19661011.16 4.07V COY CEPmu 19661011.16 6.42B COY CEPmu 19661114.20 4.09V COY CEPmu 19661114.20 6.45B COY CEPmu 19661130.10 4.07V COY CEPmu 19661130.10 6.41B COY CEPmu 19661209.07 4.10V COY CEPmu 19661209.07 6.44B COY CEPmu 19670112.07 4.13V COY CEPmu 19670112.07 6.49B COY