Van de Kamp wuxuu daawanayay xiddigta laga soo bilaabo 1938, isagoo isku dayaya, asxaabtiisa ka tirsan Sproul Observatory ee Kulliyadda Swarthmore, si ay u helaan kala duwanaansho yar oo hal micrometer ah oo ku saabsan booskeeda saxan sawir leh oo la jaan qaadi kara jahawareerka meeraha; tani waxay ku lug leedahay illaa toban qof oo isku celcelinaya natiijooyinkooda saxan, si looga fogaado khaladaadka nidaamka shaqsiyeed. Soo jeedinta Van de Kamp ee bilowga ahayd in meeraha uu leeyahay qiyaastii 1.6 MJ oo masaafo ah 4.4 AU oo ku yaal meeraha aan caadiga ahayn, iyo cabirradaas ayaa la hagaajiyay. Kadib 1969 ayaa lagu soo jeediyay warqad, in ay jiraan laba meelood oo meeraha kale ah oo u dhigma 1.1 MJ iyo 1.1 MJ.
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