Age Determination in CW ERI = BV 1000
CW Eri is a double lined spectroscopic binary star. Since the two conponents are well detached, it is possible to derive absolute elements with high accuracy. The photometric elements are based on observations obtained at Boyden observatory in 1971/72, see Mauder and Ammann, 1976. The spectroscopic data are taken from Popper, 1980. In the following table the system parameters are given.