Oku bekungacwangciswanga. Kwenzeke nje. NgoSeptemba 2022, i-NASA yaqalisa umsebenzi wovavanyo lwe-Double Asteroid Redirection Test (DART), apho inqwelo-moya enobunzima obumalunga ne-570 kg ngabom yangqubana ne-asteroid Dimorphos, isathelayithi ye-asteroid enkulu iDidymos kwinkqubo ye-binary abayidalayo, ngesantya esingaphezulu kwe-22,500 km/h. Injongo yayikukubonisa ukuba kunokwenzeka ukuphambuka kwee-asteroid kwiinjongo zokukhusela iiplanethi.
Le mpembelelo yanciphisa ngempumelelo ixesha le-orbital likaDimorphos elijikeleze iDidymos malunga nemizuzu engama-33, yadlula kakhulu imizuzu eyi-7-10 ebilindelwe. Oku kwakubangelwa kukunyuka kwamandla okuvela kwinkunkuma eyayikhutshwe yimpembelelo. Nangona kunjalo, impembelelo yayiyeyehlabathi liphela, into eyayingalindelekanga ngumntu wonke.
Uphononongo olutsha olusekelwe kwimiba emininzi eqwalaselweyo iqinisekisiweImpembelelo yeDART ayitshintshanga nje kuphela iiparameter zangaphakathi ze-orbital zesibini, kodwa kunye neeparameter ze-orbital ze-heliocentric zenkqubo yonke yeDidymos-Dimorphos ejikeleze iLanga. Oku kuthetha ukuba uluntu, okokuqala, lutshintshe intsimi yomxhuzulane wenkqubo yelanga. Kwaye oku kuya kuba nemiphumo.
Ubalo lubonise ukuba isantya sokujikeleza esi sibini se-asteroid esijikeleze iLanga sehle nge-11,7 ± 1,3 μm/s (malunga ne-42 mm/h). Oku kubangele ukuncipha kwesiqingatha sesekhondi kwixesha lokujikeleza (ixesha lokujikeleza lesibini ngaphambi kokuba kutshatyalaliswe yayiziintsuku ezingama-770) kunye nokwehla kwerediyasi ye-orbital nge-0,72–2,36 km (ukujikeleza kuyi-elliptical). Kwiminyaka elishumi edlulileyo, utshintsho oluqokelelweyo kwindawo yenkqubo luya kuba malunga ne-3,69 km. Enyanisweni, ukujikeleza kwenkqubo ejikeleze iLanga kuye kwaqala ukuncipha, ngaloo ndlela kusondele nakwiMhlaba.
Utshintsho lwe-orbital luqinisekiswe ngokuthembekileyo ngokusekelwe kwidatha epheleleyo: i-22 stellar occultations, i-5955 ground-based measurements, i-3 natural warranty yi-DART spacecraft, kunye ne-9 middle ratings ukuya kwinkqubo. Uhlalutyo lwezibalo lubonise izinga eliphezulu lokuthembeka kwiziphumo. Inxalenye yomfutho ovela kwimpembelelo kunye nokukhutshwa kwenkunkuma idluliselwe kwiziko lobunzima benkqubo, nto leyo ebangele ukuphambuka okubonakalayo kwindlela yayo ye-heliocentric.
Le mpumelelo ibalulekile ekukhuseleni iiplanethi: ingqina ukuba iimpembelelo ze-kinetic zinokuphambukisa iinkqubo ze-asteroid kwiindlela zazo ezijikeleze iLanga, okwenza kube nokwenzeka ukuthintela ukungqubana noMhlaba ngotshintsho oluncinci lwendlela ukuba isoyikiso sifunyenwe kwangethuba. Iinkcukacha ezithe vetshe malunga nale nto ziya kunikwa yi-ESA Hera mission, eza kufika kwinkqubo ngasekupheleni kweminyaka yoo-2020 ukuze ifunde umngxuma, ukungcola, kunye nolwakhiwo lwe-asteroid. Uphononongo lwangaphakathi lwento luyimfuneko ukuze kuphuculwe iimodeli zezibalo zeziphumo zempembelelo.
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