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{{DISPLAYTITLE:{{mp|2007 TU|24}}}}
{{DISPLAYTITLE:{{mp|2007 TU|24}}}}
{{Use dmy dates|date=February 2018}}
{{Infobox planet
{{Infobox planet
| minorplanet=yes
| minorplanet=yes
Line 5: Line 6:
| name={{mp|2007 TU|24}}
| name={{mp|2007 TU|24}}
| discoverer=[[Catalina Sky Survey]]
| discoverer=[[Catalina Sky Survey]]
| discovered=October 11, 2007
| discovered=11 October 2007
| mp_category=[[List of Apollo asteroids|Apollo]], [[near-Earth asteroid|NEO]], [[Potentially hazardous object|PHA]]<ref name="phys"/>
| mp_category={{Hlist
| [[List of Apollo asteroids|Apollo]]
| [[near-Earth asteroid|NEO]]
| [[Potentially hazardous object|PHA]]<ref name="phys"/>
}}
| epoch=13 January 2016 ([[Julian day|JD]] 2457400.5)<!-- from AstOrb.dat ftp://ftp.lowell.edu/pub/elgb/astorb.dat (19.01.2008) -->
| epoch=13 January 2016 ([[Julian day|JD]]&nbsp;2457400.5)<!-- from AstOrb.dat ftp://ftp.lowell.edu/pub/elgb/astorb.dat (19.01.2008) -->
| semimajor={{Convert|2.0429|AU|Gm|abbr=on}}
| semimajor={{Convert|2.0429|AU|Gm|abbr=on}}
| perihelion={{Convert|0.95153|AU|Gm|abbr=on}}
| perihelion={{Convert|0.95153|AU|Gm|abbr=on}}
| aphelion={{Convert|3.1343|AU|Gm|abbr=on|lk=on}}
| aphelion={{Convert|3.1343|AU|Gm|abbr=on|lk=on}}
| eccentricity=0.53423
| eccentricity=0.53423
| period=2.92 [[Julian year (astronomy)|yr]] (1066.5 [[Julian year (astronomy)|d]])
| period=2.92&nbsp;[[Julian year (astronomy)|yr]] (1066.5&nbsp;[[Julian year (astronomy)|d]])
| inclination=5.6232°
| inclination=5.6232°
| asc_node=127.041°
| asc_node=127.041°
| arg_peri=334.254°
| arg_peri=334.254°
| mean_anomaly=267.95[[Degree (angle)|°]]
| mean_anomaly=267.95[[Degree (angle)|°]]
| dimensions=~250 meters<ref name="NASA0125">{{cite web |title=NASA Scientists Get First Images of Earth Flyby Asteroid |publisher=[[NASA]]/[[Jet Propulsion Laboratory|JPL]] |date=2008-01-25 |url=http://www.jpl.nasa.gov/news/news.cfm?release=2008-014 |accessdate=2008-01-26| archiveurl= https://web.archive.org/web/20080129062350/http://www.jpl.nasa.gov/news/news.cfm?release=2008-014| archivedate= 29 January 2008 <!--DASHBot-->| deadurl= no}}</ref>
| dimensions=~250 meters<ref name="NASA0125">{{cite web |title=NASA Scientists Get First Images of Earth Flyby Asteroid |publisher=[[NASA]]/[[Jet Propulsion Laboratory|JPL]] |date=2008-01-25 |url=http://www.jpl.nasa.gov/news/news.cfm?release=2008-014 |access-date=2008-01-26| archive-url= https://web.archive.org/web/20080129062350/http://www.jpl.nasa.gov/news/news.cfm?release=2008-014| archive-date= 29 January 2008 <!--DASHBot-->| url-status=live}}{{Dead link|date=April 2024}}</ref>
| mass=< 2.4{{e|10}} kg<ref name="max"/>
| mass=< {{Val|2.4e10|u=kg}}<ref name="max"/>
| density=unknown
| density=unknown
| gravity=unknown
| surface_grav=unknown
| escape_velocity=< 0.58 km/h<ref name="max">radius of 0.125 km; [[Volume#Volume formulas|volume of a sphere]] * maximum likely density of 3g/cm³ (though it could be a loose [[rubble pile]]) yields an improbable mass of 2.45e10 kg and an improbable escape velocity of 0.58 km/h.</ref>
| escape_velocity=< 0.58&nbsp;km/h<ref name="max">radius of 0.125&nbsp;km; [[Volume#Formulas|volume of a sphere]] * maximum likely density of 3&nbsp;g/cm<sup>3</sup> (though it could be a loose [[rubble pile]]) yields an improbable mass of {{Val|2.45e10|u=kg}} and an improbable escape velocity of 0.58&nbsp;km/h.</ref>
| rotation={{Convert|26|h|d|abbr=on|lk=on}}<ref name=jpl-close/>
| rotation={{Convert|26|h|d|abbr=on|lk=on}}<ref name=jpl-close/>
| abs_magnitude={{Ubl
| abs_magnitude=20.2,<ref name="phys">[http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007TU24#phys_par JPL Small-Body Database Browser: 2007TU24]</ref> 20.3<ref name=jpl-close/>
| 20.2<ref name="phys">[http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007TU24#phys_par JPL Small-Body Database Browser: 2007TU24]</ref>
| 20.3<ref name=jpl-close/>
}}
| albedo=0.24 <!-- calculated via MS Excel from diameter and abs.mag.: D(km)=(1329 km)*10^(-H/5)/sqrt(p_V), where p_V is albedo. For NEAs, the default assumed value is p_V = 0.14. -->
| albedo=0.24 <!-- calculated via MS Excel from diameter and abs.mag.: D(km)=(1329 km)*10^(-H/5)/sqrt(p_V), where p_V is albedo. For NEAs, the default assumed value is p_V = 0.14. -->
| temperatures=yes
| temp_name1=[[Kelvin]]
| temp_name1=[[Kelvin]]
| mean_temp_1=unknown
| mean_temp_1=unknown
| image= 2007 TU24 radar image 20080128.jpg
| image= 2007 TU24 radar image 20080128.jpg
| image_size = 240
| image_scale =
| caption=Radar image of {{mp|2007 TU|24}}.<br>''Courtesy NASA/JPL-Caltech''
| caption=Radar image of {{mp|2007 TU|24}}
| mean_motion={{Deg2DMS|0.33754|sup=ms}} /day
| mean_motion={{Deg2DMS|0.33754|sup=ms}} / day
| orbit_ref=<ref name=jpl-close/>
| orbit_ref=<ref name=jpl-close/>
| observation_arc=1093 days (2.99 yr)
| observation_arc=1093 days (2.99&nbsp;yr)
| uncertainty=0
| uncertainty=0
| moid={{Convert|0.000483062|AU|km|abbr=on}}
| moid={{Convert|0.000483062|AU|km|abbr=on}}
Line 39: Line 46:
}}
}}


'''{{mp|2007 TU|24}}''' is an [[Apollo asteroid|Apollo]] [[near-Earth asteroid]] that was discovered by the [[Catalina Sky Survey]] in [[Arizona]] on October 11, 2007. [[Imaging radar]] has estimated that it is {{convert|250|m|ft|0|sp=us}} in diameter.<ref name="NASA0125"/> The asteroid passed 554,209&nbsp;kilometer (344,370&nbsp;mile or 1.4-[[Lunar distance (astronomy)|lunar distance]])<ref name="NASA0129">{{cite web |title=Asteroid Zooms by Earth |publisher=[[NASA]]/[[Jet Propulsion Laboratory|JPL]] |date=2008-01-29 |url=http://www.jpl.nasa.gov/news/news.cfm?release=2008-014a |accessdate=2008-01-30}}</ref> from Earth on January 29, 2008, at 08:33 [[UTC]]. (At the time of the passage it was believed the closest for any known [[potentially hazardous asteroid]] (PHA) of this size before 2027,<ref>[http://neo.jpl.nasa.gov/news/news157.html Near-Earth Asteroid 2007 TU24 to Pass Close to Earth on Jan. 29 - Should be Observable with Modest Sized Telescopes] {{webarchive|url=https://web.archive.org/web/20080124150947/http://neo.jpl.nasa.gov/news/news157.html |date=2008-01-24 }}</ref> but in 2010 {{mpl|2005 YU|55}} was measured to be 400 meters in diameter.) At closest approach the asteroid had an [[apparent magnitude]] of 10.3 and was about 50 times fainter than the [[naked eye]] can see. It required about a {{convert|3|in|mm|sing=on}} telescope to be seen.<ref name="NASA0125"/>
'''{{mp|2007 TU|24}}''' is an [[Apollo asteroid|Apollo]] [[near-Earth asteroid]] that was discovered by the [[Catalina Sky Survey]] in [[Arizona]] on 11 October 2007. [[Imaging radar]] has estimated that it is {{convert|250|m|ft|0|sp=us}} in diameter.<ref name="NASA0125"/> The asteroid passed 554,209&nbsp;kilometer (344,370&nbsp;mile or 1.4-[[Lunar distance (astronomy)|lunar distance]])<ref name="NASA0129">{{cite web |title=Asteroid Zooms by Earth |publisher=[[NASA]]/[[Jet Propulsion Laboratory|JPL]] |date=2008-01-29 |url=http://www.jpl.nasa.gov/news/news.cfm?release=2008-014a |access-date=2008-01-30 |archive-date=2 February 2008 |archive-url=https://web.archive.org/web/20080202033417/http://www.jpl.nasa.gov/news/news.cfm?release=2008-014a |url-status=dead }}</ref> from Earth on 29 January 2008 at 08:33 [[UTC]]. (At the time of the passage it was believed the closest for any known [[potentially hazardous asteroid]] (PHA) of this size before 2027,<ref>[http://neo.jpl.nasa.gov/news/news157.html Near-Earth Asteroid 2007 TU24 to Pass Close to Earth on Jan. 29 - Should be Observable with Modest Sized Telescopes] {{webarchive|url=https://web.archive.org/web/20080124150947/http://neo.jpl.nasa.gov/news/news157.html |date=2008-01-24 }}</ref> but in 2010 {{mpl|2005 YU|55}} was measured to be 400 meters in diameter.) At closest approach 2007 TU24 had an [[apparent magnitude]] of 10.3 and was about 50 times fainter than the [[naked eye]] can see. It required about a {{convert|3|in|mm|adj=on}} telescope to be seen.<ref name="NASA0125"/>


==Impact risk assessment==
==Impact risk assessment==
From the date of discovery of asteroid {{mp|2007 TU|24}} on 11 October 2007, a total of 316 observations of it had been made by 31 January 2008, spanning 112 days.<ref name="phys"/> Now the asteroid has an observation arc of about 3 years and the [[trajectory]] is well defined.<ref name="phys"/> It was removed from the [[Sentry (monitoring system)|Sentry Risk Table]] on 4 December 2007 at 14:05 [[UTC]].<ref>[http://neo.jpl.nasa.gov/risk/removed.html NEOs Removed from Impact Risks Tables]</ref>
From the date of discovery of asteroid {{mp|2007 TU|24}} on 11 October 2007, a total of 316 observations of it had been made by 31 January 2008, spanning 112 days.<ref name="phys"/> Now the asteroid has an observation arc of about 3 years and the [[trajectory]] is well defined.<ref name="phys"/> It was removed from the [[Sentry (monitoring system)|Sentry Risk Table]] on 4 December 2007 at 14:05 [[UTC]].<ref>[https://web.archive.org/web/20020602101400/http://neo.jpl.nasa.gov/risk/removed.html NEOs Removed from Impact Risks Tables]</ref>


==2008 passage==
==2008 passage==
[[Image:2007tu24 radar cropped.jpg|thumb|left|A series of low-resolution radar images of asteroid 2007 TU24]]
[[Image:2007tu24 radar cropped.jpg|thumb|left|A series of low-resolution radar images of asteroid 2007 TU24]]


[[Goldstone Deep Space Communications Complex|Goldstone Observatory]] carried out radar observations on January 23 and January 24, 2008. As of January 24, the orbit of the asteroid was known with such a high precision that scientists were able to calculate close approaches from the year 67 AD to 2141 AD.<ref name="planning">[http://echo.jpl.nasa.gov/asteroids/2007TU24/2007TU24planning.html 2007 TU24planning.html<!-- Bot generated title -->] {{webarchive|url=https://web.archive.org/web/20080120161427/http://echo.jpl.nasa.gov/asteroids/2007TU24/2007TU24planning.html |date=2008-01-20 }}</ref> On January 29, 2008 at 08:33 [[UTC]], {{mp|2007 TU|24}} passed by the earth at a nominal distance of {{convert|0.0037043|AU|km mi|abbr=on|lk=on}} with a relative speed of 9.248 [[Metre per second|km/s]].<ref name=jpl-close>{{cite web
[[Goldstone Deep Space Communications Complex|Goldstone Observatory]] carried out radar observations on January 23 and 24 January 2008. As of then, the orbit of the asteroid was known with such a high precision that scientists were able to calculate close approaches from the year 67 AD to 2141 AD.<ref name="planning">[http://echo.jpl.nasa.gov/asteroids/2007TU24/2007TU24planning.html 2007 TU24planning.html<!-- Bot generated title -->] {{webarchive|url=https://web.archive.org/web/20080120161427/http://echo.jpl.nasa.gov/asteroids/2007TU24/2007TU24planning.html |date=2008-01-20 }}</ref> On 29 January 2008 at 08:33 [[UTC]], {{mp|2007 TU|24}} passed by the earth at a nominal distance of {{convert|0.0037043|AU|km mi|abbr=on|lk=on}} with a relative speed of 9.248 [[Metre per second|km/s]].<ref name=jpl-close>{{cite web
|type=2010-10-08 last obs (arc=2.99 years)
|type=2010-10-08 last obs (arc=2.99 years)
|title=JPL Close-Approach Data: (2007 TU24)
|title=JPL Close-Approach Data: (2007 TU24)
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007TU24;cad=1#cad
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007TU24;cad=1#cad
|accessdate=30 March 2016}}</ref>
|access-date=30 March 2016}}</ref>


Observations from [[Arecibo Observatory]] were taken on February 1–4.<ref name="NASA0125"/> It is a [[Contact binary (asteroid)|contact binary asteroid]].<ref name="Binary">{{cite web
Observations from [[Arecibo Observatory]] were taken on 1–4 February.<ref name="NASA0125"/> It is a [[Contact binary (asteroid)|contact binary asteroid]].<ref name="Binary">{{cite web
|date=2013-11-18
|date=2013-11-18
|title=Binary and Ternary near-Earth Asteroids detected by radar
|title=Binary and Ternary near-Earth Asteroids detected by radar
|publisher=NASA/JPL Asteroid Radar Research
|publisher=NASA/JPL Asteroid Radar Research
|author=Dr. [http://science.jpl.nasa.gov/people/Benner/ Lance A. M. Benner]
|author=Lance A. M. Benner
|url=http://echo.jpl.nasa.gov/~lance/binary.neas.html
|url=http://echo.jpl.nasa.gov/~lance/binary.neas.html
|archive-url=https://web.archive.org/web/20040608071121/http://echo.jpl.nasa.gov/~lance/binary.neas.html
⚫
|accessdate=2014-03-01}}</ref>
|archive-date=2004-06-08
⚫
|access-date=2014-03-01}}</ref>


[[Image:Asteroid TU24 20080131.gif|thumb|none|Animation of two photos taken from Slooh Teide observatory on Jan 31, 2008]]
[[Image:Asteroid TU24 20080131.gif|thumb|none|Animation of two photos taken from Slooh Teide observatory on 31 January 2008]]


==Other close approaches==
==Other close approaches==
*Asteroid [[2004 XP14]] was the closest [[potentially hazardous asteroid]], passing Earth by {{convert|432,308|km|mi|abbr=on}}, 0.00289&nbsp;AU, or just 1.1 times the Moon's average distance from Earth on July 3, 2006.
*Asteroid {{mpl|2004 XP|14}} was the closest [[potentially hazardous asteroid]], passing Earth by {{convert|432,308|km|mi|abbr=on}}, 0.00289&nbsp;AU, or just 1.1 times the Moon's average distance from Earth on 3 July 2006.
*Asteroid [[4179 Toutatis]] (4.5&nbsp;km diameter) came within 1.5&nbsp;million&nbsp;km, 0.0104&nbsp;AU (within 4&nbsp;[[lunar distance (astronomy)|lunar distances]]) of the Earth on September 29, 2004.
*Asteroid [[4179 Toutatis]] (4.5&nbsp;km diameter) came within 1.5&nbsp;million&nbsp;km, 0.0104&nbsp;AU (within 4&nbsp;[[lunar distance (astronomy)|lunar distances]]) of the Earth on 29 September 2004.
*On August 7, 2027, [[(137108) 1999 AN10]] will pass within 388,960&nbsp;km (0.0026&nbsp;[[Astronomical unit|AU]]) of the Earth.
*On 7 August 2027, {{mpl|(137108) 1999 AN|10}} will pass within 388,960&nbsp;km (0.0026&nbsp;[[Astronomical unit|AU]]) of Earth
*On Friday, April 13, 2029, [[99942 Apophis|Apophis]] will pass the earth within the orbits of the [[geosynchronous]] [[communication satellite]]s.
*On 13 April 2029, [[99942 Apophis|Apophis]] will pass the earth within the orbits of the [[geosynchronous]] [[communication satellite]]s.


==See also==
==See also==
*[[List of notable asteroids]]
*[[List of exceptional asteroids]]
*[[Asteroid deflection strategies]]
*[[Asteroid impact avoidance]]
*[[Provisional designation|Asteroid naming conventions]]
*[[Provisional designation in astronomy|Asteroid naming conventions]]
*[[Radar astronomy]]
*[[Radar astronomy]]


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== External links ==
== External links ==
* [http://www.jpl.nasa.gov/news/news.cfm?release=2008-012 Asteroid to Make Rare Close Flyby of Earth] (Catalina Sky Survey Photo)
* [http://www.jpl.nasa.gov/news/news.cfm?release=2008-012 Asteroid to Make Rare Close Flyby of Earth] {{Webarchive|url=https://web.archive.org/web/20120316084222/http://www.jpl.nasa.gov/news/news.cfm?release=2008-012 |date=16 March 2012 }} (Catalina Sky Survey Photo)
* [http://www.int.iol.co.za/index.php?set_id=1&click_id=118&art_id=vn20080124063319844C968336 Huge asteroid to fly by past earth.Independent Online]
* [http://www.int.iol.co.za/index.php?set_id=1&click_id=118&art_id=vn20080124063319844C968336 Huge asteroid to fly by past earth.Independent Online]
* [http://blogs.discovermagazine.com/badastronomy/2008/01/25/asteroid-2007-tu24-no-danger-to-earth/ Asteroid 2007 TU24: No Danger to Earth] ([[Phil Plait]] January 25, 2008)
* [http://blogs.discovermagazine.com/badastronomy/2008/01/25/asteroid-2007-tu24-no-danger-to-earth/ Asteroid 2007 TU24: No Danger to Earth] {{Webarchive|url=https://web.archive.org/web/20111031131907/http://blogs.discovermagazine.com/badastronomy/2008/01/25/asteroid-2007-tu24-no-danger-to-earth/ |date=31 October 2011 }} ([[Phil Plait]] 25 January 2008)
* {{NeoDys|2007TU24}}
* [http://newton.dm.unipi.it/neodys2/index.php?pc=1.1.0&n=2007TU24 NEODys site entry for 2007TU24]
* {{ESA-SSA|2007TU24}}
* {{JPL small body}}
* {{JPL small body}}


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{{Small Solar System bodies}}
{{Planetary defense}}
{{Planetary defense}}
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{{Small Solar System bodies}}
{{Authority control}}


{{DEFAULTSORT:2007 TU24}}
{{DEFAULTSORT:2007 TU24}}
[[Category:Apollo asteroids]]
[[Category:Apollo asteroids|#]]
[[Category:Unnumbered minor planets]]
[[Category:Minor planet object articles (unnumbered)]]
[[Category:Contact binary (asteroid)]]
[[Category:Discoveries by the Catalina Sky Survey]]
[[Category:Radar-imaged asteroids]]
[[Category:Contact binary (small Solar System body)|#]]
[[Category:Potentially hazardous asteroids|002007]]
[[Category:Radar-imaged asteroids|#]]
[[Category:Asteroids removed from the Sentry Risk Table]]
[[Category:Near-Earth objects removed from the Sentry Risk Table|#]]
[[Category:Potentially hazardous asteroids|#]]
[[Category:Astronomical objects discovered in 2007|20071011]]
[[Category:Astronomical objects discovered in 2007|20071011]]

Latest revision as of 18:48, 12 April 2024

2007 TU24
Radar image of 2007 TU24
Discovery
Discovered byCatalina Sky Survey
Discovery date11 October 2007
Designations
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc1093 days (2.99 yr)
Aphelion3.1343 AU (468.88 Gm)
Perihelion0.95153 AU (142.347 Gm)
2.0429 AU (305.61 Gm)
Eccentricity0.53423
2.92 yr (1066.5 d)
267.95°
0° 20m 15.144s / day
Inclination5.6232°
127.041°
334.254°
Earth MOID0.000483062 AU (72,265.0 km)
Jupiter MOID2.06887 AU (309.499 Gm)
Physical characteristics
Dimensions~250 meters[3]
Mass< 2.4×1010 kg[4]
Mean density
unknown
Equatorial surface gravity
unknown
Equatorial escape velocity
< 0.58 km/h[4]
26 h (1.1 d)[2]
0.24
Surface temp. min mean max
Kelvin unknown

2007 TU24 is an Apollo near-Earth asteroid that was discovered by the Catalina Sky Survey in Arizona on 11 October 2007. Imaging radar has estimated that it is 250 meters (820 ft) in diameter.[3] The asteroid passed 554,209 kilometer (344,370 mile or 1.4-lunar distance)[5] from Earth on 29 January 2008 at 08:33 UTC. (At the time of the passage it was believed the closest for any known potentially hazardous asteroid (PHA) of this size before 2027,[6] but in 2010 2005 YU55 was measured to be 400 meters in diameter.) At closest approach 2007 TU24 had an apparent magnitude of 10.3 and was about 50 times fainter than the naked eye can see. It required about a 3-inch (76 mm) telescope to be seen.[3]

Impact risk assessment

[edit]

From the date of discovery of asteroid 2007 TU24 on 11 October 2007, a total of 316 observations of it had been made by 31 January 2008, spanning 112 days.[1] Now the asteroid has an observation arc of about 3 years and the trajectory is well defined.[1] It was removed from the Sentry Risk Table on 4 December 2007 at 14:05 UTC.[7]

2008 passage

[edit]
A series of low-resolution radar images of asteroid 2007 TU24

Goldstone Observatory carried out radar observations on January 23 and 24 January 2008. As of then, the orbit of the asteroid was known with such a high precision that scientists were able to calculate close approaches from the year 67 AD to 2141 AD.[8] On 29 January 2008 at 08:33 UTC, 2007 TU24 passed by the earth at a nominal distance of 0.0037043 AU (554,160 km; 344,340 mi) with a relative speed of 9.248 km/s.[2]

Observations from Arecibo Observatory were taken on 1–4 February.[3] It is a contact binary asteroid.[9]

Animation of two photos taken from Slooh Teide observatory on 31 January 2008

Other close approaches

[edit]

See also

[edit]

References

[edit]
  1. ^ a b c d JPL Small-Body Database Browser: 2007TU24
  2. ^ a b c d "JPL Close-Approach Data: (2007 TU24)" (2010-10-08 last obs (arc=2.99 years)). Retrieved 30 March 2016.
  3. ^ a b c d "NASA Scientists Get First Images of Earth Flyby Asteroid". NASA/JPL. 25 January 2008. Archived from the original on 29 January 2008. Retrieved 26 January 2008.[dead link‍]
  4. ^ a b radius of 0.125 km; volume of a sphere * maximum likely density of 3 g/cm3 (though it could be a loose rubble pile) yields an improbable mass of 2.45×1010 kg and an improbable escape velocity of 0.58 km/h.
  5. ^ "Asteroid Zooms by Earth". NASA/JPL. 29 January 2008. Archived from the original on 2 February 2008. Retrieved 30 January 2008.
  6. ^ Near-Earth Asteroid 2007 TU24 to Pass Close to Earth on Jan. 29 - Should be Observable with Modest Sized Telescopes Archived 2008-01-24 at the Wayback Machine
  7. ^ NEOs Removed from Impact Risks Tables
  8. ^ 2007 TU24planning.html Archived 2008-01-20 at the Wayback Machine
  9. ^ Lance A. M. Benner (18 November 2013). "Binary and Ternary near-Earth Asteroids detected by radar". NASA/JPL Asteroid Radar Research. Archived from the original on 8 June 2004. Retrieved 1 March 2014.
[edit]
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