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Apophis is about 1,100 feet (340 meters) in width. It’s expected to safely pass close to Earth – within 19,794 miles (31,860 kilometers) from our planet’s surface – on April 13, 2029. This will be the closest approach to Earth by an asteroid of this size that scientists have known about in advance.
99942 Apophis (provisional designation 2004 MN 4) is a near-Earth asteroid and a potentially hazardous object with a diameter of 370 metres (1,210 feet) [3] that caused a brief period of concern in December 2004 when initial observations indicated a probability up to 2.7% that it would hit Earth on April 13, 2029.
26 mar 2021 · The near-Earth object was thought to pose a slight risk of impacting Earth in 2068, but now radar observations have ruled that out. After its discovery in 2004, asteroid 99942 Apophis had been identified as one of the most hazardous asteroids that could impact Earth.
A near-Earth object (NEO) is any small Solar System body orbiting the Sun whose closest approach to the Sun is less than 1.3 times the Earth–Sun distance (astronomical unit, AU). [2]
Those that do are called Near Earth Objects (or NEOs). Formally, an NEO is any comet or asteroid (also referred to, in particular, as Near Earth Asteroids, or NEAs) that passes within 1.3 astronomical units (au) of the Sun — this is slightly farther than the average radius of the Earth’s orbit.
21 lis 2002 · Using the best fit of these satellite data and extrapolating the power law to higher energies, we find that the Earth is struck by an object with the energy of Tunguska (assumed to be 10 Mton...
24 maj 2021 · Asteroids, comets and other Near Earth Objects (NEOs) often appear impossibly remote, occupying spaces and times beyond the boundaries of our planet.
