(276033) 2002 AJ129, provisional designation 2002 AJ129, is a Mercury-crossing asteroid. It has the ninth-smallest perihelion of all numbered asteroids, after asteroids such as 2000 BD19, 2004 UL, and 2008 XM.[6] It makes close approaches to all of the inner planets[3] and asteroid 4 Vesta.[7] The asteroid is estimated to be between 0.5–1.2 kilometers (0.3–0.7 mi) across.[5] In January 2018 there was much media hype about this asteroid being classified as a potentially hazardous asteroid, although there is no known threat of an impact for hundreds if not thousands of years. The media has compared the size of the asteroid to the Burj Khalifa in Dubai.[8]
(276033) 2002 AJ129
The orbit is highly elliptical, moving outside Mars and inside Mercury. Positions shown for 31 January 2018 before flyby.
On 4 February 2018 at 21:31 UT, the asteroid passed about 0.028126 AU (4,207,600 km; 2,614,500 mi) from Earth.[3][10] The 2018 Earth approach distance was known with a 3-sigma accuracy of ±200 km.[3]Goldstone is scheduled to observe the asteroid from 3 to 6 February.[11] By 4 February 2018 11:00 UT, the asteroid brightened to apparent magnitude 14 and had a solar elongation of more than 100°.[12]
2172 approachedit
On 8 February 2172, the asteroid will pass about 0.00458 AU (685,000 km; 426,000 mi) from Earth.[3] The 2172 Earth approach distance is known with a 3-sigma accuracy of ±4000 km.
As we look even further into the future the known trajectory becomes more divergent. By the Earth approach of 0.24 AU (36,000,000 km; 22,000,000 mi) on 19 February 2196 the uncertainty increases to ±2.4 million km.[3]
History of close approaches of large near-Earth objects since 1908 (A)
(A) This list includes near-Earth approaches of less than 2 lunar distances (LD) of objects with H brighter than 20. (B)Nominal geocentric distance from the center of Earth to the center of the object (Earth has a radius of approximately 6,400 km). (C) Diameter: estimated, theoretical mean-diameter based on H and albedo range between X and Y. (D) Reference: data source from the JPL SBDB, with AU converted into LD (1 AU≈390 LD) (E) Color codes: unobserved at close approach observed during close approach upcoming approaches
Referencesedit
^ ab"MPEC 2002-B14 : 2002 AJ129". IAU Minor Planet Center. 19 January 2002. Retrieved 19 January 2018. (K02AC9J)
^ abc"276033 (2002 AJ129)". Minor Planet Center. Retrieved 8 February 2018.
^ abcdefghijk"JPL Small-Body Database Browser: 276033 (2002 AJ129)" (2016-04-10 last obs.). Jet Propulsion Laboratory. from the original on 18 January 2018. Retrieved 8 February 2018.
^"Asteroid 2002 AJ129 to Fly Safely Past Earth February 4 [2018]". NASA/Jet Propulsion Laboratory. 19 January 2018. Retrieved 8 February 2018.
^Dr. Lance A. M. Benner (1 February 2018). "Goldstone Radar Observations Planning: Asteroids 2002 AJ129, 2014 SR339, and 2015 BN509". NASA/JPL Asteroid Radar Research. Retrieved 3 February 2018.
^"(276033) 2002AJ129 Ephemerides for February 2018". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 3 February 2018.
^ abMarchis, F.; et al. "Multiple asteroid systems: Dimensions and thermal properties from Spitzer Space Telescope and ground-based observations". Icarus. 221 (2): 1130–1161. Bibcode:2012Icar..221.1130M. doi:10.1016/j.icarus.2012.09.013. Retrieved 24 August 2018.
External linksedit
Wikimedia Commons has media related to 2002 AJ129.
(276033) 2002 AJ129 at NeoDyS-2, Near Earth Objects—Dynamic Site
Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters
April 05, 2024
276033, 2002, 276033, 2002, aj129, provisional, designation, 2002, aj129, mercury, crossing, asteroid, ninth, smallest, perihelion, numbered, asteroids, after, asteroids, such, 2000, bd19, 2004, 2008, makes, close, approaches, inner, planets, asteroid, vesta, . 276033 2002 AJ129 provisional designation 2002 AJ129 is a Mercury crossing asteroid It has the ninth smallest perihelion of all numbered asteroids after asteroids such as 2000 BD19 2004 UL and 2008 XM 6 It makes close approaches to all of the inner planets 3 and asteroid 4 Vesta 7 The asteroid is estimated to be between 0 5 1 2 kilometers 0 3 0 7 mi across 5 In January 2018 there was much media hype about this asteroid being classified as a potentially hazardous asteroid although there is no known threat of an impact for hundreds if not thousands of years The media has compared the size of the asteroid to the Burj Khalifa in Dubai 8 276033 2002 AJ129The orbit is highly elliptical moving outside Mars and inside Mercury Positions shown for 31 January 2018 before flyby Discovery 1 2 Discovered byNEATDiscovery siteHaleakala Obs Discovery date15 January 2002DesignationsMPC designation 276033 2002 AJ129Alternative designations2002 AJ129Minor planet categoryApolloNEOPHA 3 2 Mercury crosserVenus crosserOrbital characteristics 3 4 Epoch 4 September 2017 JD 2458000 5 Uncertainty parameter 0Observation arc14 23 yr 5 199 days Aphelion2 6254 AUPerihelion0 1167 AUSemi major axis1 3711 AUEccentricity0 9149Orbital period sidereal 1 61 yr 586 days Mean anomaly288 23 Mean motion0 36m 50 04s dayInclination15 449 Longitude of ascending node138 05 Argument of perihelion211 01 Earth MOID0 0060 AU 2 3 LD Physical characteristicsMean diameter0 5 1 2 km 5 Absolute magnitude H 18 7 3 Contents 1 Description 1 1 2018 approach 1 2 2172 approach 2 References 3 External linksDescription edit2002 AJ129 was discovered on 15 January 2002 by astronomers of the NEAT team at Haleakala Observatory Hawaii United States 1 2 It was removed from the Sentry Risk Table on 3 February 2002 9 It is a Mercury Venus Earth and Mars crossing asteroid With an observation arc of 14 years it has a well determined orbit and was last observed in 2016 3 It is classified as an Apollo asteroid 3 because it is a near Earth asteroid with a semi major axis larger than Earth s It is also categorized as a potentially hazardous asteroid 3 but that does not mean there is a near term threat of an impact It is a potentially hazardous asteroid merely as a result of its size absolute magnitude H 22 and Earth minimum orbit intersection distance Earth MOID 0 05 AU 2018 approach edit On 4 February 2018 at 21 31 UT the asteroid passed about 0 028126 AU 4 207 600 km 2 614 500 mi from Earth 3 10 The 2018 Earth approach distance was known with a 3 sigma accuracy of 200 km 3 Goldstone is scheduled to observe the asteroid from 3 to 6 February 11 By 4 February 2018 11 00 UT the asteroid brightened to apparent magnitude 14 and had a solar elongation of more than 100 12 2172 approach edit On 8 February 2172 the asteroid will pass about 0 00458 AU 685 000 km 426 000 mi from Earth 3 The 2172 Earth approach distance is known with a 3 sigma accuracy of 4000 km As we look even further into the future the known trajectory becomes more divergent By the Earth approach of 0 24 AU 36 000 000 km 22 000 000 mi on 19 February 2196 the uncertainty increases to 2 4 million km 3 History of close approaches of large near Earth objects since 1908 A PHA Date Approach distance in lunar distances Abs mag H Diameter C m Ref D Nominal B Minimum Maximum 152680 1998 KJ9 1914 12 31 0 606 0 604 0 608 19 4 279 900 data 458732 2011 MD5 1918 09 17 0 911 0 909 0 913 17 9 556 1795 data 163132 2002 CU11 1925 08 30 0 903 0 901 0 905 18 5 443 477 data69230 Hermes 1937 10 30 1 926 1 926 1 927 17 5 700 900 13 data69230 Hermes 1942 04 26 1 651 1 651 1 651 17 5 700 900 13 data2017 NM6 1959 07 12 1 89 1 846 1 934 18 8 580 1300 data 27002 1998 DV9 1975 01 31 1 762 1 761 1 762 18 1 507 1637 data2002 NY40 2002 08 18 1 371 1 371 1 371 19 0 335 1082 data2004 XP14 2006 07 03 1 125 1 125 1 125 19 3 292 942 data2015 TB145 2015 10 31 1 266 1 266 1 266 20 0 620 690 data 137108 1999 AN10 2027 08 07 1 014 1 010 1 019 17 9 556 1793 data 153814 2001 WN5 2028 06 26 0 647 0 647 0 647 18 2 921 943 data99942 Apophis 2029 04 13 0 0981 0 0963 0 1000 19 7 310 340 data2017 MB1 2072 07 26 1 216 1 215 2 759 18 8 367 1186 data2011 SM68 2072 10 17 1 875 1 865 1 886 19 6 254 820 data 163132 2002 CU11 2080 08 31 1 655 1 654 1 656 18 5 443 477 data 416801 1998 MZ 2116 11 26 1 068 1 068 1 069 19 2 305 986 data 153201 2000 WO107 2140 12 01 0 634 0 631 0 637 19 3 427 593 data 276033 2002 AJ129 2172 02 08 1 783 1 775 1 792 18 7 385 1242 data 290772 2005 VC 2198 05 05 1 951 1 791 2 134 17 6 638 2061 data A This list includes near Earth approaches of less than 2 lunar distances LD of objects with H brighter than 20 B Nominal geocentric distance from the center of Earth to the center of the object Earth has a radius of approximately 6 400 km C Diameter estimated theoretical mean diameter based on H and albedo range between X and Y D Reference data source from the JPL SBDB with AU converted into LD 1 AU 390 LD E Color codes unobserved at close approach observed during close approach upcoming approachesReferences edit a b MPEC 2002 B14 2002 AJ129 IAU Minor Planet Center 19 January 2002 Retrieved 19 January 2018 K02AC9J a b c 276033 2002 AJ129 Minor Planet Center Retrieved 8 February 2018 a b c d e f g h i j k JPL Small Body Database Browser 276033 2002 AJ129 2016 04 10 last obs Jet Propulsion Laboratory Archived from the original on 18 January 2018 Retrieved 8 February 2018 AstDys 2 Retrieved 2011 September 13 a b NeoDys 2 Retrieved 2011 September 13 List of asteroids with q lt 0 3075 AU generated by the JPL Small Body Database Search Engine Retrieved 2011 September 10 NEODyS 2 Close approaches A potentially hazardous asteroid bigger than Burj Khalifa is about to fly near our planet Business Insider Retrieved 19 January 2018 NEOs Removed from Impact Risks Tables Archived from the original on 2 June 2002 Asteroid 2002 AJ129 to Fly Safely Past Earth February 4 2018 NASA Jet Propulsion Laboratory 19 January 2018 Retrieved 8 February 2018 Dr Lance A M Benner 1 February 2018 Goldstone Radar Observations Planning Asteroids 2002 AJ129 2014 SR339 and 2015 BN509 NASA JPL Asteroid Radar Research Retrieved 3 February 2018 276033 2002AJ129 Ephemerides for February 2018 NEODyS Near Earth Objects Dynamic Site Retrieved 3 February 2018 a b Marchis F et al Multiple asteroid systems Dimensions and thermal properties from Spitzer Space Telescope and ground based observations Icarus 221 2 1130 1161 Bibcode 2012Icar 221 1130M doi 10 1016 j icarus 2012 09 013 Retrieved 24 August 2018 External links edit nbsp Wikimedia Commons has media related to 2002 AJ129 276033 2002 AJ129 at NeoDyS 2 Near Earth Objects Dynamic Site Ephemerides Observation prediction Orbital info MOID Proper elements Observational info Close approaches Physical info Orbit animation 276033 2002 AJ129 at ESA space situational awareness Ephemerides Observations Orbit Physical properties Summary 276033 2002 AJ129 at the JPL Small Body Database nbsp Close approach Discovery Ephemeris Orbit diagram Orbital elements Physical parameters Retrieved from https en wikipedia org w index php title 276033 2002 AJ129 amp oldid 1195658979, wikipedia, wiki, book, books, library,
