Earth's first Trojan asteroid orbit

Référence de la vidéo 11929047
Animation of the orbital path of Earth's first Trojan asteroid, 2010 TK7 (green). Earth's orbital path around the Sun is shown by blue dots. Trojans are asteroids that share an orbit with a planet, orbiting around the Lagrange points of the planet-Sun system, either 60 degrees in front of (L4) or behind (L5) the planet in its orbit. Lagrange points are stable gravity wells where the gravitational forces of the Sun and planet cancel each other, allowing stable orbits to exist. 2010 TK7 orbits the L4 point. The clock at upper left shows how the orbit changes over time. This asteroid was discovered by NEOWISE, the asteroid-hunting portion of NASA's WISE mission, in 2010, and announced in July 2011. 2010 TK7 is thought to be some 300 metres in diameter.
Licence : Droits gérés
Crédit : Science Photo Library / Wiegert, Paul / University of Western Ontario, Canada / NASA
Model Release : Non requis
Property release : Non requis
Durée : 46 Secondes
Aspect ratio : 16/9
Restrictions : -

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