Hubble Space Telescope Detection of the Nucleus of Comet C/2014 UN271 (Bernardinelli–Bernstein)

@article{Hui2022HubbleST,
  title={Hubble Space Telescope Detection of the Nucleus of Comet C/2014 UN271 (Bernardinelli–Bernstein)},
  author={Man-To 文韜 Hui 許 and David C. Jewitt and Liang-Liang 亮亮 Yu 余 and Max J. Mutchler},
  journal={The Astrophysical Journal Letters},
  year={2022},
  volume={929},
  url={https://api.semanticscholar.org/CorpusID:247158849}
}
We present a high-resolution observation of the distant comet C/2014 UN271 (Bernardinelli–Bernstein) using the Hubble Space Telescope on 2022 January 8. The signal of the nucleus was successfully isolated by means of a nucleus extraction technique, with an apparent V-band magnitude measured to be 21.65 ± 0.11, corresponding to an absolute magnitude of 8.63 ± 0.11. The product of the visual geometric albedo with the effective radius squared is pVRn2=157±16 km2. If the ALMA observation by… 
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