Solar cycle 5

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Solar cycle 5
Sunspot data
Start date April 1798
End date August 1810
Duration (years) 12.3
Max count 82.0
Max count month February 1805
Min count 5.3
Cycle chronology
Previous cycle Solar cycle 4 (1784-1798)
Next cycle Solar cycle 6 (1810-1823)
The Dalton minimum in the 400-year history of sunspot numbers, showing the low peaks for solar cycles 5 and 6.

Solar cycle 5 was the fifth solar cycle since 1755, when extensive recording of solar sunspot activity began.[1][2] The solar cycle lasted 12.3 years, beginning in April 1798 and ending in August 1810 (thus falling within the Dalton Minimum). The maximum smoothed sunspot number (SIDC formula) observed during the solar cycle was 82.0, in February 1805 (the second-lowest of any cycle to date, behind solar cycle 6, as a result of being part of the Dalton Minimum), and the starting minimum was 5.3.[3]

See also[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]"