Near Earth Objects
Near-Earth Objects (NEOs) are comets and asteroids that have been nudged by the
gravitational attraction of nearby planets into orbits that allow them to enter
the Earth's neighborhood. Composed mostly of water ice with embedded dust particles,
comets originally formed in the cold outer planetary system while most of the rocky
asteroids formed in the warmer inner solar system between the orbits of Mars and Jupiter.
The scientific interest in comets and asteroids is due largely to their status as the
relatively unchanged remnant debris from the solar system formation process some 4.6
billion years ago. The giant outer planets (Jupiter, Saturn, Uranus, and Neptune)
formed from an agglomeration of billions of comets and the left over bits and pieces
from this formation process are the comets we see today. Likewise, today's asteroids
are the bits and pieces left over from the initial agglomeration of the inner planets
that include Mercury, Venus, Earth, and Mars
The vast majority of NEOs are asteroids, referred to as Near-Earth Asteroids (NEAs).
NEAs are divided into groups (Aten, Apollo, Amor) according to their perihelion distance (q),
aphelion distance (Q) and their semi-major axes (a). See table
Recent NEO Events
February 2nd 2017, ASTEROID NEAR MISS: A newly discovered asteroid 2017 BS32 will flyby Earth on February 2, 2017
at a distance of 0.41 LD from the surface. This near-Earth object belongs
to Aten group of asteroids.
2017 BS32 was discovered on January 30 by Pan-STARRS 1, Haleakala. Its estimated
size is between 11 and 25 m (36 to 82 feet). It will flyby Earth at 20:27 UTC
on February 2 at a distance of 0.41 LD (161 280 km / 100 214 miles) from the
surface at a speed (relative to Earth) of 11.56 km/s.
This is the fourth know near-Earth asteroid to pass very close to Earth
(below 1 LD) since January 8, 2017
January 26th 2015, ASTEROID NEAR MISS:
The asteroid 2004 BL86 will fly by Earth on Jan. 26, passing at a
range of about 745,000 miles (1.2 million kilometers), about three
times the distance between the Earth and the moon. It will be the
asteroid's closest approach to Earth for the next 200 years,
according to NASA scientists.
Asteroid 2004 BL86 is nearly 1,800 feet (549 meters) in diameter,
but there is no risk of it hitting the Earth when it zips by. The
next asteroid of similar size to come near Earth will be the asteroid
1999 AN10, which will make its closest approach in 2027, according
to the NASA statement
February 18th 2014, ASTEROID NEAR MISS:
Asteroid 2000 EM26. A "potentially hazardous" asteroid the size of three
football fields will come uncomfortably close to Earth early on Tuesday.
The space rock, known as 2000 EM26, poses no threat and will pass the
Earth at just under nine times the distance to the moon.
But it is defined as a potentially hazardous near-Earth object (NEO)
large enough to cause significant damage in the event of an impact.
Scientists estimate the asteroid, travelling at 27,000mph, is 270 metres (885ft) wide.
At its closest approach at 2am UK time, the rock will be 2.1m miles
from Earth, or 8.8 lunar distances.|
February 15th 2013, ASTEROID NEAR MISS:
Asteroid 2012 DA14 will be closest to Earth on February 15, 2013 at about
19:24 GMT (2:24 p.m. EST or 11:24 a.m. PST), when it will be at a distance
of about 27,700 kilometers (17,200 miles) above the Earth's surface.
This is so close that the asteroid will actually pass inside the ring of
geosynchronous satellites, which is located about 35,800 kilometers (22,200 miles)
above the equator, but still well above the vast majority of satellites, including the
International Space Station. At its closest, the asteroid will be only about 1/13th
of the distance to the Moon. The asteroid will fly by our planet quite rapidly,
at a speed of about 7.8 kilometers/second (17,400 miles/hour) in a south-to-north
direction with respect to the Earth|
15/2/2013 03:20 GMT In a seperate incident
a meteor crashing in Russia's Ural mountains has injured at least 950 people, as the
shockwave blew out windows and rocked buildings. Many videos have appeared on the internet
January 27th 2012, ASTEROID NEAR MISS:
2012 BX34 is a small Aten asteroid that made a close flyby of the Earth on 27 January 2012.
The asteroid passed within 0.0004371 AU (65,390 km; 40,630 mi) of Earth during its closest
approach at 15:25 GMT, conducting one of the closest asteroid passes on record. 2012 BX34
measures around 8 meters (26 ft) across; if it had impacted in 2012, it would have been too
small to pass through Earth's atmosphere intact.
November 8th 2011, ASTEROID NEAR MISS: Near-Earth asteroid 2005 YU55 passed within 0.85 lunar
distances from the Earth. This was the closest an asteroid has been to Earth in 200 years, according to Nasa.
It is also the largest space rock fly-by Earth has seen since 1976; the next visit by a large asteroid will be 2028.
The aircraft-carrier-sized asteroid was darkly coloured in visible wavelengths and nearly spherical, lazily spinning about
once every 20 hours as it raced through our neighbourhood of the Solar System.
|January 13 2010, ASTEROID NEAR MISS: at 12:46 pm Greenwich time Asteroid 2010 AL30,
will make a close approach to the Earth's surface to within 76,000 miles, about 10-15 meters across.
|Novemeber 6th 2009, ASTEROID NEAR MISS: at 2132 UT, asteroid 2009 VA barely missed Earth when it
flew just 14,000 km above the planet's surface. That's well inside the "Clarke Belt" of geosynchronous satellites.
If it had hit, the 6 metre wide space rock would have disintegrated in the atmosphere as a spectacular fireball,
causing no significant damage to the ground. 2009 VA was discovered just 15 hours before closest approach by
astronomers working at the Catalina Sky Survey.