Red Buckeye – Aesculus pavia

by | Dec 19, 2023 | Red Buckeye

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2015 AZ43 (also written 2015 AZ43) is an Apollo near-Earth asteroid roughly 70 meters in diameter. On 10 February 2015 with a 29.5-day observation arc, it showed a 1 in 5,880 chance of impacting Earth on 27 February 2107.[3] However, the NEODyS nominal best-fit orbit shows that 2015 AZ43 will be 2.8 AU (420,000,000 km; 260,000,000 mi) from Earth on 27 February 2107.[5] A (non-impacting) Earth close approach in 2056 makes future trajectories diverge.[6] It was removed from the JPL Sentry Risk Table on 23 February 2015 using JPL solution 26 with an observation arc of 40 days that included radar data.[7]

With an absolute magnitude of 23.5,[2] the asteroid is about 50–120 meters in diameter.[4]

2015 flyby

2015 AZ43 was discovered on 11 January 2015 by Pan-STARRS at an apparent magnitude of 20 using a 1.8-meter (71 in) Ritchey–Chrétien telescope.[1] On 15 February 2015 the asteroid passed 0.0197 AU (2,950,000 km; 1,830,000 mi) from Earth.[8] The Goldstone Deep Space Network detected the asteroid on 18–19 February 2015, but the signal was not strong enough for delay-Doppler imaging.[9]

References

  1. ^ a b "MPEC 2015-B05: 2015 AZ43". IAU Minor Planet Center. 16 January 2015. Retrieved 7 February 2015. (K15A43Z)
  2. ^ a b c d "JPL Small-Body Database Browser: (2015 AZ43)" (last observation: 2015-02-20; arc: 40 days). Jet Propulsion Laboratory. Retrieved 4 April 2016.
  3. ^ a b "Earth Impact Risk Summary: 2015 AZ43". WayBack Machine: NASA/JPL Near-Earth Object Program Office. 10 February 2015. Archived from the original on 10 February 2015. Retrieved 24 February 2015.
  4. ^ a b "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 2 March 2001. Retrieved 7 February 2015.
  5. ^ "2015AZ43 Ephemerides for 25 February 2107 through 2 March 2107". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 14 February 2015.
  6. ^ "2015AZ43 close approaches". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 8 February 2015.
  7. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Archived from the original on 2 June 2002. Retrieved 24 February 2015.
  8. ^ "JPL Close-Approach Data: (2015 AZ43)" (last observation: 2015-02-20; arc: 40 days). Retrieved 24 February 2015.
  9. ^ Lance A. M. Benner. "Goldstone Asteroid Schedule". NASA/JPL Asteroid Radar Research. Archived from the original on 19 November 1996. Retrieved 20 February 2015.
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