The space rock dances in front of the planet along its orbital path, just beyond its reach
Scientific American
EARTH'S ASTEROID This almost edge-on view of the Earth's orbit and that of the Trojan asteroid 2010 TK7 shows (in green) the vertical motion of the asteroid relative to the Earth over the course of several years. The asteroid was discovered by NASA's WISE telescope and is the first conformed Trojan asteroid in Earth's Lagrange points. Image: Paul Wiegert, The University of Western Ontario
The first in a long-sought type of asteroid companion to Earth has now been discovered, a space rock that always dances in front of the planet along its orbital path, just beyond its reach.
The asteroid, called 2010 TK7, is nearly 1,000 feet (300 meters) across and currently leading the Earth by about 50 million miles (80 million kilometers).
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extremely interesting.
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