<prompt> Bheka isigaba esingezansi bese uphendula umbuzo emva kwalokho ngolimi olufanayo nesigaba: Ukudlula: Ukuba khona kwenyanga e-Encke Gap kwabikezelwa okokuqala nguJeffrey N. Cuzzi noJeffrey D. Scargle ngo-1985, ngokusekelwe emaphethelweni amagagasi esigaxa okwakukhombisa ukuphazamiseka kwamandla adonsela phansi. Ngo-1986 u-Showalter nabanye baveza umjikelezo wayo nobuningi bayo ngokulingisa umzila wayo wokudonsela phansi. Bafika ekubikezelweni okunembile kakhulu okungu-133,603 10 km kwe-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 ngu-8.6×1012 weSaturn. Umbuzo: Uyini umehluko we-semi-axis?  <response>: 19 amakhilomitha 