Relative Sunspot Number

Details Relative Sunspot Number Relative Sunspot Number

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke5131.&link_type=abstract

"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 5131. Bristol: Institute of Physics Publishing, 2001

Astronomy and Astrophysics

Astrophysics

Sun, Solar Activity

Scientific paper

An index of sunspot activity originally devised in 1858 by J R Wolf (1816-93) of the Federal Observatory of Zurich and otherwise known as the Zurich sunspot number. The relative sunspot number, denoted by the letter R, is given by the formula R=k(f+10g), where g is the number of visible sunspot groups, f is the total number of individual spots visible on the face of the Sun and k is a correction ...

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