Based on apparent changes in the position of Epsilon Eridani between 1938 and 1972, Peter van de Kamp proposed that an unseen companion with an orbital period of 25 years was causing gravitational perturbations in its position. This claim was refuted in 1993 by Wulff-Dieter Heintz and the false detection was blamed on a systematic error in the photographic plates.
based on AppArent chANgEs in THe poSitIoN of Epsilon erIdANi beTweeN 1938 AnD 1972, peter VAn de KaMP proPosEd THAt AN unSeeN COmpAnIOn wiTh An Orbital pErIod of 25 years Was cauSiNg gravItaTIonal pErTUrbations in itS posItion. this cLaim Was ReFUtEd in 1993 bY WuLff-DietEr HeINTz aND ThE fAlse detEcTion was BlaMed on A systEmatIc eRroR in tHe pHotOgrapHiC PlAtes.