NEOWISE Observations of the Potentially Hazardous Asteroid (99942) Apophis

  title={NEOWISE Observations of the Potentially Hazardous Asteroid (99942) Apophis},
  author={Akash Satpathy and Amy K. Mainzer and Joseph R. Masiero and Tyler R. Linder and Roc M. Cutri and E. L. Wright and Jana Pittichov{\'a} and Tommy Grav and Emily A. Kramer},
  journal={The Planetary Science Journal},
Large potentially hazardous asteroids (PHAs) are capable of causing a global catastrophe in the event of a planetary collision. Thus, rapid assessment of such an object’s physical characteristics is crucial for determining its potential risk scale. We treated the near-Earth asteroid (99942) Apophis as a newly discovered object during its 2020–2021 close approach as part of a mock planetary defense exercise. The object was detected by the Near-Earth Object Wide-field Infrared Survey Explorer… 



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