This 5:2 Resonance was known to Kerala astrologers. A Vyazha vatta Kalam is 12 years and Shani vatta Kalam is 30 years ! So sidereal periods, Bhagan Poorthi Kala, of Jupiter and Saturn had synchronicities . 12*5 =60 and 2*30 =60. In other words, Jupiter : Saturn = 5:2 Resonance !