Extrema in Sunspot Cycle Linked to Sun's Motion
- Cite this article as:
- Landscheidt, T. Solar Physics (1999) 189: 413. doi:10.1023/A:1005287705442
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Partitions of 178.8-year intervals between instances of retrograde motion in the Sun's oscillation about the center of mass of the solar system seem to provide synchronization points for the timing of minima and maxima in the 11-year sunspot cycle. In the investigated period 1632–1990, the statistical significance of the relationship goes beyond the level P=0.001. The extrapolation of the observed pattern points to sunspot maxima around 2000.6 and 2011.8. If a further connection with long-range variations in sunspot intensity proves reliable, four to five weak sunspot cycles (R≤0) are to be expected after cycle 23 with medium strength (R≈100).