<prompt> Ukubikezela kokuthi kukhona inyanga ku-Encke Gap kwaqala ngoJeffrey N. Cuzzi noJeffrey D. Scargle ngo-1985, ngokusekelwe emaphethelweni amagagasi esikhala okukhombisa ukuphazamiseka kwamandla adonsela phansi. Ngo-1986 u-Showalter et al. baveza umjikelezo wayo kanye nobuningi bayo ngokumodela umzila wayo wokudonsela phansi. Bafika ekubikezelweni okunembile kakhulu kwe-133,603 10 km ye-semi-major axis kanye nobuningi obungu-510×1012 mass of Saturn, futhi baphetha ngokuthi kwakukhona inyanga eyodwa kuphela ngaphakathi kwesikhala se-Encke. I-semi-major axis yangempela ihluka ngo-19 km futhi isisindo sangempela singu-8.6×1012 we-Saturn. Umbuzo: I-semi-axis ihluka kangakanani?  <response>: 19 amakhilomitha 