Solar cycle 5

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The Sun with some sunspots visible.

Solar cycle 5 was the fifth solar cycle since 1755, when recording of solar sunspot activity began.[1][2] The solar cycle lasted 12.6 years, beginning in May 1798 and ending in December 1810. The maximum smoothed sunspot number (monthly number of sunspots averaged over a twelve-month period) observed during the solar cycle was 49.2, and the minimum was zero.[3]

See also[edit]

References[edit]

  1. ^ Kane, R.P. (2002). "Some Implications Using the Group Sunspot Number Reconstruction". Solar Physics 205(2), 383-401.
  2. ^ "The Sun: Did You Say the Sun Has Spots?". Space Today Online. Retrieved 12 August 2010. 
  3. ^ SIDC Monthly Smoothed Sunspot Number. "[1]"