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Contents

   



(Top)
 


1 Overview  





2 References  





3 External links  














2012 KT42






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From Wikipedia, the free encyclopedia
 


2012 KT42
Designations

Minor planet category

  • NEO
  • Orbital characteristics[1]
    Epoch 13 January 2016 (JD 2457400.5)
    Uncertainty parameter5
    Aphelion2.4839 AU (371.59 Gm)
    Perihelion0.71144 AU (106.430 Gm)
    Periastron94.628°

    Semi-major axis

    1.5977 AU (239.01 Gm)
    Eccentricity0.55470

    Orbital period (sidereal)

    2.02 yr (737.60 d)

    Mean anomaly

    261.31°

    Mean motion

    0° 29m 17.052s / day
    Inclination2.1932°

    Longitude of ascending node

    69.515°

    Argument of perihelion

    259.13°
    Earth MOID0.000968708 AU (144,916.7 km)
    Physical characteristics
    Dimensions~4–10 metres[2]

    Synodic rotation period

    0.06057 h (3.634 min)

    Absolute magnitude (H)

  • 29.0[1]
  • 2012 KT42 is an Apollo near-Earth asteroid first observed by astronomer Alex R. Gibbs of the Mount Lemmon Survey with a 1.5-meter reflecting telescope on 28 May 2012.

    Overview[edit]

    The asteroid had a close approach to the Earth on 29 May 2012, approaching to only ~8950 miles (~14,440 km) above the planet's surface. This means 2012 KT42 came inside the Clarke Belt of geosynchronous satellites. In May 2012, the estimated 5- to 10-metre-wide asteroid ranked #6 on the top 20 list of closest-approaches to Earth. There was no danger of a collision during the close approach. 2012 KT42 passed roughly 0.01 AU (1,500,000 km; 930,000 mi) from Venus on 8 July 2012.[1]

    It is estimated that an impact would produce an upper atmosphere air burst equivalent to 11 kt TNT,[4] roughly equal to Hiroshima's Little Boy. The asteroid would be vaporized as these small impacts occur approximately once per year. A comparable-sized object caused the Sutter's Mill meteorite in California on 2 April 2012. It was removed from the Sentry Risk Table on 30 May 2012.[5]

    References[edit]

    1. ^ a b c "JPL Close-Approach Data: (2012 KT42)" (last observation: 2012-05-29; arc: 1 day; uncertainty: 5). Retrieved 1 April 2016.
  • ^ "Conversion of Absolute Magnitude to Diameter". Minor Planet Center. Retrieved 30 May 2012.
  • ^ "2012 KT42 Orbit". Minor Planet Center. 29 May 2012. Retrieved 30 May 2012.
  • ^ "Earth Impact Risk Summary: 2012 KT42". NASA/JPL Near-Earth Object Program Office. Retrieved 29 May 2012.[dead link]
  • ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Archived from the original on 2 June 2002. Retrieved 30 May 2012.
  • External links[edit]


    Retrieved from "https://en.wikipedia.org/w/index.php?title=2012_KT42&oldid=1199096742"

    Categories: 
    Apollo asteroids
    Minor planet object articles (unnumbered)
    Fast rotating minor planets
    Near-Earth objects in 2012
    Astronomical objects discovered in 2012
    Hidden categories: 
    All articles with dead external links
    Articles with dead external links from June 2021
    Articles with short description
    Short description matches Wikidata
    Use dmy dates from February 2018
    Articles with JPL SBDB identifiers
    Articles with MPC identifiers
     



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