"At closest approach on Dec. 12th, asteroid 4179 Toutatis will be 7 million km away or 18 times farther than the Moon.
Asteroid Toutatis is well known to astronomers; it passes by Earth’s orbit every 4 years. Measuring 4.5 km in length, it is one of the largest known potentially hazardous asteroids (PHAs), and its orbit is inclined less than half-a-degree from Earth's."
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