Misiunea DART (Double Asteroid Redirection Test) va fi lansată pe 23 noiembrie, cu o rachetă Falcon 9 a companiei SpaceX a lui Elon Musk, de la baza spațială Vandenberg din California.
Obiectele din apropierea Pământului sunt asteroizi și comete care trec la mai puțin de 48 de milioane de kilometri de Terra. În septembrie 2022, Dimorphos va fi la circa 11 milioane de kilometri de Pământ.
Naveta DART va intra intenționat în coliziune cu Dimorphos pentru a-i modifica orbita în jurul asteroidului Didymos, potrivit NASA. Coliziunea va fi înregistrată de LICIACube, un satelit care va însoți misiunea și care se va desprinde de DART înainte de impact, pentru a filma evenimentul.
DART se va lovi de Dimorphos cu o viteză de aproape 24.000 de kilometri pe oră.
Impactul va modifica viteza lui Dimorphos pe orbita în jurul asteroidului Didymos cu 1%, ceea ce nu pare mult, dar va modifica perioada de orbitare cu câteva minute. Această modificare va putea fi observată și măsurată cu telescoapele de pe Terra.
Datele culese de misiunile DART și de Hera, o misiune care va fi lansată ulterior, pentru a sesiza urmările impactului, vor contribui la strategiile de apărare planetară, ajutând la a înțelege ce tip de forță este necesară pentru a modifica orbita unui asteroid din apropierea Pământului, care ar putea lovi planeta noastră în viitor.
Foto: nasa.gov/planetarydefense/dart/ Johns Hopkins Applied Physics Lab
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