(620094)_2016_AJ193

<span class="nowrap">(620094) 2016 AJ<sub>193</sub></span>

(620094) 2016 AJ193

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(620094) 2016 AJ193 (provisional designation 2016 AJ193; also known as 2010 KV134) is a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.4 kilometres (0.87 mi) in diameter. It was discovered on 17 May 2010 by the Wide-field Infrared Survey Explorer (WISE) satellite, but was lost until it was reobserved on 16 January 2016.[5][2] With an observation arc over 11 years, 2016 AJ193 has a well-determined orbit and trajectory through the year 2086.[3] The asteroid's orbit is only potentially hazardous on a time scale of thousands of years.[6][7]

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On 21 August 2021, the asteroid safely made a close approach to Earth from a distance of 0.0229 AU (3.43 million km; 2.13 million mi), or 8.92 lunar distances (LD). During closest approach, 2016 AJ193 reached a peak apparent magnitude of 14, visible to ground-based observers with telescope apertures of at least 20 cm (8 in).[4][6] It is the largest asteroid that approached within 10 LD (3.8 million km; 2.4 million mi) of Earth in 2021.[8]

The asteroid received the permanent minor planet number 620094 by the Minor Planet Center on 7 April 2023.[9]

2016 AJ193's rotation shown in radar images taken by Goldstone on 22 August 2021

References

  1. "2016 AJ193". Minor Planet Center. International Astronomical Union. Retrieved 3 September 2021.
  2. "MPEC 2020-B104 : 2016 AJ193". Minor Planet Electronic Circular. Minor Planet Center. 23 January 2020. Retrieved 3 September 2021.
  3. "JPL Small-Body Database Browser: (2016 AJ193)" (2021-08-21 last obs.). Jet Propulsion Laboratory. Retrieved 3 September 2021.
  4. Benner, Lance A. M. "Goldstone Radar Observations Planning: 2016 AJ193 and 2011 UC292". Jet Propulsion Laboratory. California Institute of Technology. Retrieved 3 September 2021.
  5. "MPEC 2016-B28 : 2016 AJ193". Minor Planet Electronic Circular. Minor Planet Center. 18 January 2016. Retrieved 3 September 2021.
  6. Irizarry, Ezzie (20 August 2021). "Heads Up! Close Asteroid Pass August 21". EarthSky. Retrieved 3 September 2021.
  7. O'Neill, Ian J.; Fox, Karen; Handal, Joshua (3 September 2021). "Planetary Radar Observes 1,000th Near-Earth Asteroid Since 1968". Jet Propulsion Laboratory. NASA. Retrieved 3 September 2021.
  8. "NEO Earth Close Approaches". Center for Near Earth Object Studies. Jet Propulsion Laboratory. Retrieved 3 March 2021.
  9. "M.P.C. 163231" (PDF). Minor Planet Circular (163231). Minor Planet Center: 1211. 7 April 2023. Retrieved 21 April 2023.



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