Pickering scale

The Pickering scale is a scale of rating astronomical seeing, the blurring of images caused by atmospheric turbulence.[1][2] The scale was developed by William H. Pickering (1858–1938) of Harvard College Observatory, using a 5" (13 cm) refractor.[3][4] Seeing of 1 to 3 is considered very poor, 4 to 5 is poor, 6 to 7 is good, and 8 to 10 is excellent.[5][6]

References

  1. ^ "A Scale of Seeing". Sky & Telescope. 2006-07-17. Retrieved 2022-07-07.
  2. ^ Canada, Environment (2013-04-16). "Astronomy Sky Condition - Environment Canada". weather.gc.ca. Retrieved 2022-07-07.
  3. ^ "astronomical seeing, part 2: seeing measurement methods". www.handprint.com. Retrieved 2022-07-07.
  4. ^ "Courses in Astrophotography". www.damianpeach.com. Retrieved 2022-07-07.
  5. ^ Wlasuk, Peter (2000). Observing the Moon. Springer Science & Business Media. ISBN 978-1-85233-193-1.
  6. ^ "RASC Calgary Centre - Atmospheric Seeing". calgary.rasc.ca. Retrieved 2022-07-07.


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