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Updated18/10/2017 19:30 

Near Earth Objects

Up and Coming Close Approaches (NEOs)

descddistv_relh *
2017 TO52017-Oct-18 00:150.1051825.24554824.879
2017 TX52017-Oct-18 16:250.01171410.23112125.821
2017 TD52017-Oct-18 19:260.02858418.70115324.976
2006 TU72017-Oct-18 21:220.04779913.26432221.9
2017 UJ2017-Oct-19 06:280.00708612.01611725.476
2017 TG22017-Oct-19 12:460.05090219.22620321.623
2007 TF682017-Oct-19 13:500.16537013.93050022.7
2017 TD62017-Oct-19 18:530.0012789.20994227.236
2017 TA62017-Oct-19 22:480.0170244.43136426.536
2017 UG2017-Oct-20 10:050.01095410.57098627.777
2017 SY202017-Oct-20 10:170.0485227.17518224.298
5001362017-Oct-20 10:190.1371641.92652622.8
2017 TO22017-Oct-20 15:440.03569813.68720923.25
2014 UR2017-Oct-20 16:010.0635684.43976626.6
2017 SH142017-Oct-20 20:250.0393976.86427524.477
2017 TG52017-Oct-21 04:170.05465810.77947225.028
2017 TL62017-Oct-21 10:130.0661328.93940425.93
2017 TG42017-Oct-21 15:080.01235011.44256624.199
2017 TC52017-Oct-21 19:280.0399898.32019226.206
2017 TV52017-Oct-22 07:430.00865710.71262526.953
Data Courtesy of CNEOS

Past 10 Days (NEOs)

descddistv_relh *
2017 TW52017-Oct-17 19:380.00792415.53811327.057
2017 UA2017-Oct-17 15:160.0030677.97673228.585
2017 TE52017-Oct-17 11:090.00343510.92308625.869
2017 TU32017-Oct-17 05:320.02087611.95178824.678
2017 TH52017-Oct-16 17:160.00066712.05709128.198
2017 TK42017-Oct-15 22:490.0107274.18782327.598
2013 UM92017-Oct-15 18:590.0435667.80685124.8
2017 UC2017-Oct-15 09:330.0340525.38465326.196
2017 UF2017-Oct-15 03:220.00254923.06705327.863
2017 UD2017-Oct-14 10:460.01004115.66274325.605
2017 TV12017-Oct-14 06:400.01435510.35465626.206
2017 TJ42017-Oct-13 19:240.0260937.21122625.045
2005 TE492017-Oct-13 18:260.02177711.17680126.7
2017 TU12017-Oct-13 12:210.01339210.36147426.17
2017 UE2017-Oct-13 10:360.0113278.39155826.93
2017 TU52017-Oct-13 10:300.0175767.73309127.227
2017 TK22017-Oct-13 06:090.01266611.59495225.742
2017 TT12017-Oct-13 03:130.00646910.69612527.182
2017 TZ52017-Oct-12 19:560.0178869.74576426.792
2012 TC42017-Oct-12 05:420.0003357.64656326.7
2017 RV12017-Oct-12 02:440.04559410.90179320.068
2017 TJ22017-Oct-11 22:160.02859911.65092124.836
2017 TJ62017-Oct-11 08:000.0181706.33434827.377
2017 SB202017-Oct-11 01:290.0229457.12766624.843
2017 TY52017-Oct-10 22:230.0097257.50829226.214
2017 TH42017-Oct-10 21:490.01708213.94419224.365
2017 SN212017-Oct-10 15:570.0230197.58528426.002
2017 TF52017-Oct-10 07:400.00187922.81583824.692
2017 TT42017-Oct-09 16:330.00596015.79749327.145
2017 TA52017-Oct-09 14:020.01922811.25712127.247
2017 TN42017-Oct-09 11:210.0412388.52267124.926
2017 TH22017-Oct-09 07:450.0054915.03123528.715
2017 TB52017-Oct-09 01:130.0454237.99654125.123
2017 TX42017-Oct-08 16:490.01858810.49836026.318
2017 TV32017-Oct-08 16:260.0173466.99684626.019
2017 TP22017-Oct-08 15:000.0498459.65221424.543
2017 TE42017-Oct-08 08:590.0182366.27572426.807
Data Courtesy of CNEOS

Top 10 Closest (NEOs)

descddistv_relh *
2011 CQ12011-Feb-04 19:397.92235789136613e-059.69342868392632.1
2008 TS262008-Oct-09 03:308.44275210330433e-0515.76041537551733.2
2004 FU1622004-Mar-31 15:358.63186539416262e-0513.39062950720528.7
2016 DY302016-Feb-25 19:599.56221898051414e-0517.34463750310930.5
2017 GM2017-Apr-04 10:320.00010873404262413918.49540423602129.885
2011 MD2011-Jun-27 17:010.0001246770105512536.70253326839728.0
2014 LY212014-Jun-03 17:380.00013397607385190813.30979153919729.1
2009 VA2009-Nov-06 21:320.00013673894034838310.30220945688928.6
2012 KT422012-May-29 07:070.00013912278430123517.03756903296329.0
2017 EA2017-Mar-02 14:050.0001396769172118418.42416107295430.8
 Data Courtesy of CNEOSSince 1st Jan 2000 

des - primary designation of the asteroid or comet
cd - time of close-approeach (formatted calendar date/time)
dist - nominal approach distance (au)
v_rel - velocity relative to the approach body at close approach (km/s)
h - absolute magnitude H (mag)
* - An asteroid's absolute magnitude is the visual magnitude an observer would record if the asteroid were placed 1 Astronomical
     Unit (AU) away, and 1 AU from the Sun and at a zero phase angle.
1 AU = Astronomical Unit is approximately the mean distance between the Earth and the Sun, ~150 million kilometers
1 LD = Lunar Distance = ~384,000 kilometers

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
Group Description Definition
NECs Near-Earth Comets q<1.3 AU, P<200 years
NEAs Near-Earth Asteroids q<1.3 AU
Atiras NEAs whose orbits are contained entirely with the orbit of the Earth
(named after asteroid 163693 Atira).
a<1.0 AU, Q<0.983 AU
Atens Earth-crossing NEAs with semi-major axes smaller than Earth's
(named after asteroid 2062 Aten).
a<1.0 AU, Q>0.983 AU
Apollos Earth-crossing NEAs with semi-major axes larger than Earth's
(named after asteroid 1862 Apollo).
a>1.0 AU, q<1.017 AU
Amors Earth-approaching NEAs with orbits exterior to Earth's but interior to Mars'
(named after asteroid 1221 Amor).
a>1.0 AU, 1.017<q<1.3 AU
PHAs Potentially Hazardous Asteriods: NEAs whose Minimum Orbit Intersection
Distance (MOID) with the Earth is 0.05 AU or less and whose absolute
magnitude (H) is 22.0 or brighter.
MOID<=0.05 AU, H<=22.0


Near Earth Objects - Our solar system is teeming with asteroids and comets, some of which periodically pass close to Earth. These space rocks, called near-Earth objects, provide good opportunities for study and can also be potentially dangerous to Earth. Ask the dinosaurs !!!

October 12th 2017
2012 TC4 The large space rock, named 2012 TC4, was first spotted five years ago by the Pan-STARRS telescope at the Haleakala Observatory, in Hawaii, before disappearing as it orbits the sun. It then reemerged in July on a trajectory well inside our lunar orbit. Scientists said the asteroid swung by Earth about 6:42am BST, 42,000 kilometers) above Antarctica at 0542 GMT Thursday. That's about 11 percent the distance between Earth and the moon, and just beyond the orbit of geostationary satellites..

September 1st 2017
At 1206 GMT, the roughly 2.7-mile-wide (4.4 kilometers) asteroid 3122 Florence came within a mere 4.4 million miles (7 million km) of Earth just 18 times the distance from our planet to the moon.

April 19th 2017
According to NASA, the asteroid 2014 JO25 will come within 4.6 lunar distances, This will be the closest of an asteroid of this size since a September 2004, with an estimated diameter of 0.65 km, larger than the Rock of Gibraltar.

February 2nd 2017
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
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 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 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
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
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
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
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.

NEO Links

For a complete list of recent NEO's CNEOS
Potential future Earth impact events that the CNEOS Sentry System has detected based on currently available observations

Page redesigned 12-Mar-2017 - following JPL closing, data now from cneos